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It is the lightest Most powerbanks including Anker PowerCore Speed PD do not support charging devices from the powerbank when the powerbank itself is charging called pass-through charging as it can seriously degrade battery life. Instead, using a dual port wall charger will allow you to fast-charge both phone and powerbank from a single AC outlet.
Newly released models are not always superior to existing models. For example, the new released launches, in fact, do not support Quickcharge or Apple fast-charge or fast powerbank charging at all. Thank you very much for that response! Please help. Everest Base camp. Power is unreliable in the tea houses and I plan to solar charging panels. The devices I will want to charge daily — iPad Pro and apple watch. As needed my iPhone X.
I need the lightest weight and still effective portable charger. What do you recommend and do I purchase from this link? Apple Watch requires very less power to charge and hence we are ignoring it. So we will need a powerbank that fulfils these criteria —. The powerbank should be able to get extract maximum battery capacity in lowest time as you may have to sometimes pay by hour and the electricity availability is not assured at all. The powerbank should be compatible with portable solar chargers. Yes, you can buy from the given links. The reason for this is that USB-C PD charging charges at higher voltage and gives much lower powerbank battery charging efficiency.
Use as small cables as possible when charging from powerbank. The reason for this is that the bigger battery powerbank gets charged at a much faster initial rate than a smaller battery. Again when short on time, charge empty or more discharged batteries first when charging from a wall charger. I typically travel with a iPhone X and a new iPad air with retinal display. I would like to be able to fast charge these with a power pack during plane flights mostly the iPad.
I occasionally travel where I might need to charge my phone and iPad and a panasonic camera battery least once. Weight is a concern so the lightest solution would be great. I would like to be able to fast charge the power bank also. What would be your suggestion for me? Our top recommendation to meet all your specified requirements is Anker PowerCore PD portable charger. It will also itself get fast-charged in just 4 hours with its included wall charger. It is also the lightest 20, mAH range PD wall charger And also where to buy from. I have an iPhone X and he will be purchasing the next released iPhone soon.
Both these are available via Amazon Australia. Both these powerbanks can charge two phones at once — one phone at fast-charging speed using USB-C ports and one at regular charging speed using regular USB port. A visit to Disneyland usually involves frequent use of camera and the Disneyland app. The powerbank must also be comfy and handy enough for charging on the go. This is a slim, light 7. This costs almost same as Powercore and also weighs almost the same 8. It has the added benefit of 2 charging ports, and will thus allow you to charge both phones simultaneously.
Its drawback is that it is not as slim and handy to hold in hand while charging on the go. Thank you so much! If you will prefer 4 hr quick charging for your powerbank, then the newer Powercore II is a far better option offering better gripy design, lower price and lighter weight 6. If you are OK with the The only reason we did not recommend it was that due to its higher weight and larger size, you may find it inconvenient to carry it around with you all day.
If its weight and bulk is not a problem, then PowerCore PD offers the following advantages over any other Anker charger we have discussed —. I am travelling through Europe and will need to charge a Samsung S6 and iPhone 6. We are after something light weight, slim and fast charging. The prices for Anker products in Australia are unusually high and the available product range is also quite outdated.
It gets charged in 4 hours using S6 wall charger and will fast charge both the Samsung S6 and iPhone 6 at maximum supported speeds. Its biggest drawback is that it is not slim 23mm. Fo Australian readers, we highly recommend the slim 14 mm , light, and fast-charging Xiaomi Mi Powerbank2 Xiaomi is the 3rd largest phone maker in the world and the Mi powerbanks provide excellent quality and value for money.
Xiaomi Mi Powerbank2 is pocketable and priced far more reasonably then equivalent Anker powerbanks available in Australia and offers same 4 hour fast charging of the powerbank and fastest speed charging support for Samsung S9, S8, S7, S6 and iPhones. The mother in law is going to Europe and needs something to charge her phone on the go. She has a iphone 6s and wants something she can have on her person, not necessarily in a backpack.
I was thinking maybe a series or the , or maybe one of the if its light and small. While travelling, it is not always possible to charge the phone or powerbank every night, and another full day of phone use for extra 60 or so grams 2. During this time my partner and I will be running the length of the two islands — 3,km in total! I want to be able to charge both at the same time.
So, I need a power bank with a reasonably large capacity without it weighing a ton. What would you recommend please? For your specific requirements, mAH is the absolute minimum ideal capacity for the powerbank. We recommend the Anker Powercore II for a number of reasons —. This is sufficient for days of low-use and using power-saving modes on the phones. Anker Powercore II can be fully fast charged in about 5 hours using the standard Samsung Galaxy A6 wall charger. Regular mAh powerbanks will take about hrs to charge. The ability to charge and top-up the powerbank is handy while charging in situations such as at the airports or rest-stops while travelling, where you will want to top-up the powerbank with as much power as possible in very short amounts of time.
PowerCore II weighs just grams 13 oz. This makes it one of the lightest mAH powerbanks around. Two ports and adequate output capacity means you can charge both devices, even in fast charging mode, at once. Few tips for extracting maximum possible battery capacity from your powerbank and extend the battery life of the phones when away from civilization —. While charging from the powerbank, switch off the fast-charging mode in Samsung Galaxy A6. Fast charging uses high voltages and wastes a lot of power. This may be acceptable in the city where a wall outlet is just hours away but absolutely not needed when away on the trail.
Use short and high quality charging cables while charging from the powerbank max 1 feet long. Long cables will waste precious battery capacity of the powerbank. Had a question regarding fast charging for iPhone X. I see that the Anker PowerCore Speed PD has the fastest charging capabilities and generally is the best for my device. If you also require a fast charging wall charger, you can club it with the excellent Anker Powerport II Thank you for this article; it was clearly written and even I could understand most of it!
However, I like to be safe and so ask for your recommendation for me. Thank you. It is also fairly light at 13 oz grams. Thank you for your prompt reply. One quick question: The links from Anker site as well as all the Amazon links to Anker products from our site take you to only the genuine Anker products sold by AnkerDirect.
I had a query. Recently i bought a anker powercore. Will my anker fast charge itself using the charging adapter of note 8! A good choice for Note 8! Waaay too much information for me to understand. Can you help me? Which would you recommend? It also comes with a bundled fast charger which will recharge the powerbank in 4 hrs. It comes with a bundled fast charger which will quickly recharge the powerbank in 4. Considering the fact that you have 3 devices, Anker PowerCore PD seems like a better choice as it has extra battery capacity and one extra charging port.
Hi, Thanks for a great site. Very informative. Are there any power banks with:. It comes with a default auto shut-off feature that switches off the powerbank after 5 minutes if the output current drops below 30mA. However, this feature can be turned off in its settings, thereby making it an Always On power bank , useful for charging in various niche applications such as sensor systems, Raspberry Pi, or remote monitoring camera systems etc.
In fact, you can set output voltage to anything from 1 volt to 24 volt. The Voltaic Systems V44 Always-On portable charger also features pass-through charging charge the powerbank while it charges devices as well. Could you please kindly suggest me which ones to buy? Does it have to do with Power Delivery? Or those devices like HP laptops are a bit special? Could you please explain why Power Core is recommended over C? As far as I know, this is the exact same model except the type-C input. Is there any other difference between these two power banks? Thanks in advance. Hi, Our recommendation is based on the usually lower price of PowerCore Many thanks for the reply.
Oddly Anker Drect via amazon says it can ship the solar charger to australia but not the PD. Weird eh? Please can you tell me if there is a way round this? Ok so for high altitude trekking I am hoping to avoid some of those recharger fees. However I want to charge Olympus bln-1 camera batteries as well as Galaxy s8.
I think i need the largest single Amps output to charge the camera batteries by usb? Very grateful for your thoughts … jono. Hi Jono, Thanks for the queries and the appreciation! We will answer the queries one by one —. Both will fast-charge your Samsung S8, get charged in hrs, and provide adequate power to charge your BLN-1 camera battery at the same time.
Anker PowerCore Speed PD is a more future proof option and will get fully recharged in 4 hrs with the bundled charger — a plus during travel. PowerCore Elite will not fast-charge your S8, takes much longer to recharge than these two, and its 3 amp max USB output will not be useful for either your phone or your BLN-1 camera battery. Hi there, thanks so much for all the detailed info!! I have one question that keeps bugging me. I am leaving for 2 months of trekking in Patagonia and will often be out and about in the wilderness for around one week before being able to recharge properly.
Does the PD functionality of the power bank interfere with charging from the solar panel? My thought is that with this power bank I can keep a charge for my macbook and the power bank is more future proof given that probably USB-C devices will become more and more common. What would you suggest?
First, the feasibility of a portable solar charger for Patagonia trek. Assuming you are leaving soon, during summer in Patagonia Nov-Feb you can expect decent usable sunlight for hours due to its high-latitude location. This ample daylight time makes it worthwhile to carry the additional 1 pound or so weight of a portable solar charger on a long-duration trek in the region in the summer. While using a non-PD wall charger, such as a solar charger, the charging speed is extremely slow 0.
This allows it to be charged at maximum possible speed supported by most portable solar chargers such as Anker Powerport 2 or RAVPower 24 watt solar charger. This additional capacity will be very useful on a long trek as you plan to use a power hungry Macbook Pro. Also, as an aside, if you find the Anker Powerport 2 solar charger out of stock, both RAVPower Solar charger and Aukey 28 watt portable solar charger are good alternatives.
Second, you suggest both the RAWPower Solar Charger and the Aukey 28 watt portable solar chargers as alternatives to the Anker Powerport 2 solar charger, both are quite bigger and heavier than the Anker one, although obviously this means I can get more power out of them, the extra weight and size might become problematic for me given I am already getting more weight with the power bank.
Do you think the Anker solar charger is good enough anyways or not? Basically I need to find the best combination of power bank and solar charger that keeps the weight to a minimum. Both build-quality-wise and output-power-quality-wise, Anker PowerPort 2 watt solar charger is the best portable solar charger of the three that we are considering, besides also being the lightest about The only reason we suggested the other two as alternatives was if the Anker Powerport 2 is out-of-stock or exorbitantly priced happens often lately. If you can find it in stock, then of course Anker PowerPort 2 is the solar charger to buy.
Another great alternative is Anker Powerport Solar 2 Lite 15 watt at about 14oz. If you cannot find it on Amazon, it is available for direct purchase in the US at official Anker website. At the end of the day, perhaps the best solar charger is the one you can easily carry around, and watt Anker Powerport Solar 2 Lite will offer a decent balance of portability and power output.
Hi, i have a Samsung s8.
I travel a lot in Europe. Considering the large battery capacity of iPad Pro 9. This will enable you to recharge your iPad Pro once and your iPhone about three times. We will recommend two power banks with the difference being the recharge speeds of the powerbanks. Both these portable chargers weigh about the same 13 oz and have similar dimensions —. PowerCore — PowerCore will recharge your iPad and iPhone at the fastest possible speed simultaneously.
It can be recharged in 10 hours using the standard Apple 12 watt iPad wall charger. Although I do not have any immediate plans to upgrade my iPhone7 or Ipad Pro, would you recommend one over the other if I do? The high capacity powerbanks 20, mah and above take a long time to charge with regular chargers about 10 hrs to charge a non fast-charging 20, mAh powerbank with an iPad Pro watt charger.
While travelling, a user has lots of things on their mind and it is not always always possible to put the powerbank on charge hrs in advance. Also, at airports and rest-stops, you may usually get access to a wall charger for a short period of time and you will want to charge your powerbank as much as possible in that short period.
Hi Asim, If you want the maximum external battery capacity at the lowest cost and do not need the Quickcharge capability, buy an Anker PowerCore or Anker PowerCore AC adapter not included. You do not really need a shell for the powerbank keeping it safe. All I need is to have something to keep in my rucksack, which can give me a single charge of my Sony Xperia X Compact — just as a backup. The phone that will be used with this powerbank will be an iPhone 7 and iPhone 6. Amazon's Choice recommends highly rated, well-priced products available to ship immediately.
When recharging from empty, fast charge powerbanks get recharged at more than three times the speed of non fast-charging powerbanks. First of all thanks for all this usefull information! Mostly Apple minded and I will continue to upgrade in the future. I would like a powerbank which can charge at least 2 devices at once as fast as possible. Future proof would also be nice. What is my best option? I found the new powercore speed pd, but It will only charge 1 device.
It gives a message to buy the powercore 2 I think I benefit more by having power IQ over quick charge since I own more apple products. It also gets recharged quite fast 5 hours with a QC 3. Anker PowerCore II Or too much? PowerCore PD is one of the latest powerbanks from Anker and was released in late I am planning on using it for an iphone 8. PowerCore Speed is a watt fast charging powerbank Quickcharge 3. However, it cannot be fast-charged and takes 6 hrs to recharge. It supports max charging speed for all QC 3. I do not understand the major difference.
I am confused again. Anker Powercore Speed PD gets charged in 4 hours with the bundled wall charger. The weight, size and charging speeds of both are almost same. I own an Iphone 5s. I know Iphone does not support Qc. I want to powerbank to charge fast. I have an older phone that is fine generally for me during the day LG — Nexus 5 but when travelling I will be using it a lot more for directions.
I also will be bringing and ipad with us that we might need to charge during the day if we are both searching for stuff online. I will also be upgrading my phone most likely in the next year but not to the best of best phones but one that is a year or two old model not sure of the make of the phone in the future.
We also do a lot of camping so this will come in handy. What would be the best options if I just got something to cover my current needs vs also covering any future needs? I was leaning towards and 20k mah size as I will be carrying it around with me as we walk around on our travels. Anker PowerCore II will perfectly support your existing Nexus 5 and any of your future phones as you will will be buying a year old phone next year , we are assuming that you will, at best, buy the top-end Android phones available currently.
It also has adequate output to support simultaneous charging of iPad and phone. Anker PowerCore II is one of the lightest mAh capacity powerbanks available with an easy to hold ergonomic design and can be fully charged in just 5 hours with any good Quickcharge wall charger such as Anker 39w dual charger. Both the fast charging feature and light weight are extremely useful features to have in a powerbank while travelling.
Thanks for the feedback. Any benefit at looking at the one of the newer power banks that have USB-C power input? Would mean faster charging for the power bank I assume but not something that I really need and ability to charge any future USB-C devices in the future. Is the trend going towards USB-C on all devices?
Can you verify exactly what comes with this powercore model? It is an old powerbank that is much heavier 1 pound or gms! Also, it cannot fast-charge either new iPhones or new Android smartphones as it uses watt USB-C charging which is steps behind what latest phones support. Once you factor-in the bundled wall charger, it costs almost same as PowerCore II A watt fastcharge input mah powerbank such as PowerCore II gets charged in 5 hours. If there is no label on the package or the label is different from the example, your product cannot be verified.
The security code applies to products sold in these countries. Hi, which powerbank would you recommend for charging an iPhone 5 and iPhone 6s? Hi Amanda, After considering your requirements, we will recommend either of these two powerbanks —. The powerbank itself will get charged overnight 10 hrs with any 2 amp wall charger such as Anker 24 watt dual folding travel wall charger. Anker PowerCore Compact — This is the lower priced and lower weight option with weight of just 8. The powerbank itself can be recharged in 6 hrs with a 2 amp wall charger.
Hi there, Well done for providing great advice for all of us that are trying to work out the right power bank for our individual needs. I currently have an iphone 5 and will hold onto this for a little while longer. I will also upgrade to one of the newer iphone versions in the near future. I understand that some of the products features wont benefit me on the iphone 5, but I would like to cover myself for the future update of whatever iphone I decide to get next.
I am going to do alot of hiking and would like to know the best anker product for me. Could you please narrow it down for me. Regards Dale. Here are our reasons: It is especially convenient while hiking and on the move. The stock Apple wall charger that comes with the new iPhones does not deliver fast charging. If you want fast charging, you will either have to buy a much expensive Macbook all charger 29 watt or more or some other quality PD wall charger.
Thank you very much for recommending this product. I would have been there for days trying to work all that out. Your help is very much appreciated Regards Dale. I own a iphone 7 plus i want a power bank that will change my phone at least 3 times. Reasons — It will charge iPhone 7s three times at its fastest supported speed. It even charges Androids at almost QC 2. At just 8. Excellent compact build and reliable customer service. The reason being its support for 5v 3 amp charging. Are you able to advise please? I need it to charge an iPhone 6s, a Would like more than one output as I envisage charging two devices at the same time.
Please can you advise which would be best? Anker PowerCore — This is our ideal recommended powerbank for you. It has 2 ports and weighs PowerCore can charge any of your two devices at excellent speed simultaneously and is a reliable, robust, easy to carry, and well-priced powerbank. All I need is to have something to keep in my rucksack, which can give me a single charge of my Sony Xperia X Compact — just as a backup. Hi, We recommend PowerCore mAh as it gets charged in half the time of Astro E1 and is also a much more newer version.
Another great option, especially for travellers is PowerCore Fusion It combines wall charger and powerbank in one package, meaning you will have to remember to pack just one item instead of two. Looking at Anker 21 watt solar and Anker battery pack that will charge off of it very well. Have heard not all external batteries can charge off of solar?? What is best combo?? Thanks, Marc. Hi Marc, It is true that not all external batteries can handle solar charging well.
Personally, if I have to choose one I will recommend Anker PowerCore II due to three reasons — — Extra or reserve backup capacity is always handy on the trail. Sunlight supply is often very inconsistent and moreover as solar charging is quite slow, especially when on the move, the reserve battery capacity offered by mah is always handy when outdoors.
Thanks, Rabh. Sorry for my English. I speak French. Wow, this website is very helpful. I had read everything and spend hours trying to understand how powerbanks work. Right now I have a Iphone SE. However I will change my cell phone at the end of the year. I still have no idea if I will keep an Apple cell phone or go with a Samsung Galaxy so I need a versatile powerbank that can be great for both Apple and Androids. Minimum 2 ports. Not mine.
However, do you suggest to take this in case I upgrade for a better Iphone or Galaxy later on? Or is there a great Anker powerbank that is sold with a fast wall charger? If not, my wall charger is the Apple cube. That means it will not charge quickly enough, right? So do I need to buy a quicker wall charger? Will it make a BIG difference? Thanks for the query. It also comes bundled with a 30 watt USB-C charger and hence you will not have to buy the wall charger separately.
Besides this, it can also charge Macbooks at decent speed Right now I only have an Iphone SE and a camera. I know that this phone do not support QC but after reading the reviews here, you all suggest to buy an option with QuickCharge 3. It will also get charged in a decent time about 8 hrs using standard S7 wall charger or 2. You can combine it with an Anker QC 3. If you spend few bucks more for PowerCore Speed , you will be able to recharge your powerbank in abt 5.
With QC 3. This may be helpful in situations where you have forgotten to put your powerbank on charge hours beforehand. Thanks for all the helpful info. Does Anker have a powerbank with USB type c? Both offer 5 volt 3 amp fast charging, Quickcharge 3. Both are similar with a maximum charging output of 18 watt with the difference being that PowerCore II is much lighter and compact and hence costs more.
This leads me to a reliable battery only option instead. Hi Adam, PowerCore is indeed seems to be the best choice with your specific requirements regarding weight. You can also consider RAVPower as well as it weighs just 2. Apologies for the delayed reply due to a bug in our anti-spam plugin blocking a lot of the genuine comments. The first one is a Galaxy J3 and the other is a Galaxy S4 mini, what power bank would you recommend? As both of these phones support a maximum of 2 amp charging, you need not buy expensive powerbanks with Quickcharge etc. Both of these offer excellent value for money with PowerCore being the smallest powerbank and PowerCore being the best option if you need a powerbank with 2 ports.
If you ever upgrade your phones, both of them will continue charging even the latest phones at pretty fast charging speeds as they are capable of charging at up to 2. Can I ask for advice, am planning a 3 week trek. I will need to regularly charge a Usb battery charger for my canon Eos m5 batteries, my Samsung phone, a kindle and a gopro. What is the best power bank setup, ideally I want to avoid paying to charge when staying at trekking lodges. A very important factor here is the number days you will be out in the wild at an average without access to a charging outlet.
In order to help you find the best battery-mix, let us calculate the approximate daily battery requirement. If we add-up the estimated battery requirements of all your devices, we see that you will require a charge of about mah per day if you charge all the devices with the following assumed use pattern:. So we have about mah of approximate theoretical battery requirement in a day.
At this rate of battery consumption, a high capacity 26,mah powerbank will last you about 3 days. On the trail, it is best to assume that the charging rate will be half of this — about mah a day. Thus a solar charger will enable you to top-up the high-capacity charger and increase its use to about days. With these considerations in mind and assuming we want to lug minimum weight, here are our recommendations:. In my personal experience, when on the trail, a solar charger gives peace of mind that you will NEVER be completely out of battery and desperate for a wall charger.
While buying solar panels, opt for the largest available size 21 watt for 2 reasons: Bigger solar panels are better for this. I am looking for a recommendation on which Anker PowerBank I should invest in. I am going to be doing a bit of traveling soon, and I will need a portable charger since I will mainly be out and about rather than near an outlet. The phone that will be used with this powerbank will be an iPhone 7 and iPhone 6.
I hope you can help me with choosing a powerbank! Hi Lydia, Thanks for the query. We will recommend a minimum mAH powerbank for travel and charging 3 devices. However, a powerbank with Quickcharge Input or any other fast charging input will give you the benefit of quickly recharging the powerbank in about hrs whenever you have access to a wall outlet as compared to the hrs taken to usually recharge such massive capacity powerbanks. Both these powerbanks have dual input and will get recharged in under 6 hours via a 2. Both these powerbanks have 3 output ports with max 6 amp output, meaning you can charge both your iphones and the camera at their maximum charging speeds simultaneously from the powerbank!
Both of these will recharge all the 4 devices 2 iPhones, camera, and the dual input powerbank simulataneously at their maximum possible charging capacity. Do let us know if you have any further queries, PBG team. Hi, Loved this helpful article. I found a shop selling them but the description at the bottom was in Chinese and the prices were very low so I thought they might be fake ones. Thanks for your assistance. Here is the link to their Anker products store.
The price for all these 3 models is almost same. Kindly give a detailed comparison. If you want the maximum external battery capacity at the lowest cost and do not need the Quickcharge capability, buy an Anker PowerCore or Anker PowerCore Buying Anker powerbanks in India can be tricky as many unauthorized sellers sell Anker battery packs at crazy steep prices.
Cloudtail also offers the best prices on Amazon India for Anker powerbanks and you can get some very good deals if you explore. Thanks for this article! Qualcomm Quick Charge not supported. Certified Safe: Anker's MultiProtect safety system ensures complete protection for you and your devices. What You Get: Anker PowerCore portable charger, Micro USB cable, travel pouch, welcome guide, our worry-free month warranty and friendly customer service.
There is a newer model of this item: Frequently bought together. Total price: Add all three to Cart Add all three to List. Buy the selected items together This item: Sold by AnkerDirect and ships from Amazon Fulfillment. FREE Shipping. Sold by Khankastore and ships from Amazon Fulfillment.
Customers who bought this item also bought. Page 1 of 1 Start over Page 1 of 1. Exclusive items from Our Brands. Special offers and product promotions Color: Here's how restrictions apply Add both to Cart. Have a question? Don't see what you're looking for? Ask the Community. There was a problem completing your request. Please try your search again later. From the manufacturer. PowerCore Probably our most popular charging series. PowerCore A revolution in high-capacity portable charging. Product Highlights. MultiProtect A combination of 11 safety features that work together to provide ultimate protection for your devices, your chargers and most importantly: Compact and Portable Smaller than a deck of cards and as light as a baseball.
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If you're looking for peace of mind every time you leave the house, this power bank doesn't disappoint. It's the size of a credit card and only a hair heavier than my iPhone 6 making it extremely portable without being bulky and heavy. There's a power button you press which shows how much power is left via 4 blue leds when it's dead, only one led will flash. So far, I've been able to charge my phone about 4 times from near empty to full before having to charge the power bank. It comes with a usb cable to charge the power bank itself as well as a drawstring pouch.
What I love the most about this power bank is how effective it's been. The power bank itself requires at least 2 hours to charge from empty to full but once charged, your phone will charge to full in less time. As a result, I haven't charged my phone using a wall outlet since I bought this power bank more than a week ago. Not having to worry about my phone going dead or being near a wall outlet is the best feeling next to purchasing a new phone. This portable charger worked as described for two months and then it stopped working completely. I never over charged it and I used it sparingly.
Now, it will not charge-up, turn on or charge any device. It has totally failed. I purchased two others in May and they also failed after a few months. This product appears to have a design flaw and lack quality control because the life expectancy is less than advertised. I'm pretty disappointed with the charger. I've had it for less than a month and used it probably a total of 5 times. It no longer holds a full charge. I charged it overnight thinking I needed to charg it for a longer period of time, but that didn't work either.
I tried The battery pack would not fully charge. I tried using it and it only gave my phone 1. I tried to charge it again and it would only charge a quarter of the way after 24 hrs. I got a lemon and returned it. I've had this power cell for almost 1 year. I left it on my car for a few months in variant weather and never charged it or used it. I am very impressed that even sitting without use and in a hot car, this thing still worked great.
I feel like it was definitely worth the money and am so glad I bought it. I bought the Anker brand because I'd been so pleased with the first one. They work great with any battery powered electronic product that charges via USB - phones, tablets, WiFi speakers, etc. This model has only one output, but, according to the specs, can charge a smart phone two to three times before going flat. I really doubt I'll ever run it flat because my usage isn't very demanding. So, why only three stars if this charger has so many great points?
I found my first one DOH! This newer model takes twice as long to charge as the older one. Its output is limited and takes twice as long to charge up a phone or tablet compared to the older model, and the older model has two outputs to charge two products simultaneously.