Anker PowerCore 20100 - Ultra High Capacity Power Bank with Most Powerful 4.8A Output, PowerIQ Technology for iPhone, iPad and Samsung Galaxy and More (Black)

I’ve been a fan of Anker products for a while now and they’re my first choice brand. Excellent quality products and value for money and backed up with first class after service for peace of mind. Simple yet robust. It charges my devices quickly and is more than enough for me to use out and about for a number of days. I don’t stress out anymore with this by my side. It’s not the fastest in charging up but understand it’s better for product longetivity. Fine by me and just plug it in overnight and good to go by AM. What sets Anker apart is the after service if anything goes wrong. I’ve seen it reported by other people and I got to experience it recently. I had found the micro USB connection for power input always a tad loose from the beginning. I let it go as I could get by. Then it reached a point where it was difficult getting a secure connection. I sent Anker an email with a description of the problem. Initially I asked for just a new cable because a different cable did help make it better and I didn’t want to get into a bun fight. Anker asked me a few questions to ascertain root cause and concluded the port was faulty and sent me out a brand new powerbank very quickly! Wow! Am very impressed. A company that didn’t just do the bare minimum but wanted my compete satisfaction. You’ve certainly got that. Well done and thanks again Anker! Update: 7 June 2019 I bought the original back in July 2018. A replacement as per above was sent to me due to Micro USB port being faulty. Gave great service and the unfortunately the replacement developed a fault when whilst charging it would stop after a few minutes. Contact led Anker and again they responded quickly and sent me out a new one with no quibble and very quickly. They were naturally disappointed that I had to contact them again and I accept that it is rare occurrence. Very happy with the after service of this company and they’ve come through for me again.

I was looking for a power pack that delivers on three fronts. Firstly, and most importantly I needed a pack that could deliver a high-current. Secondly, I needed a unit that had a good capacity. Lastly, I needed a pack that was easily portable and didn't take up too much space. My application is perhaps a little different from the norm. rather than having a portable recharging capacity for my phone, I’m looking for a power pack for LED lighting arrays; a long strip of LED's. I need them to be powered independently of household mains supplies in a package that could easily be swapped out for recharging. Depending on the controller, the power requirements of the LED array can vary from around 0.5 watts with only a few LED’s lit, up to about 20 watts with all LED’s lit. That’s quite a load for a battery pack. Many power packs claim to have a 2 Amp current delivery capability, but this unit with a purported output of 4.8 amp across 2 USB ports (2.4 Amp per port) and a good charge capacity make it a great candidate for my needs. Form Factor About the size of a small pencil case (166 x 58 x 22 mm), the Aker 20100 is a good size for my needs. It has a good heft to it too. Weighing in at a specified 356 grams, it feels like a solid bit of kit. The case is plastic but it feels robust and looks very smart. Power Delivery With the two USB ports connected in parallel I testing the device up to 4 amps, the most I can draw with my current electronic load. I also tested each of the ports individually at 2.4 amps, the maximum specified load for this unit, while monitoring the output voltage and the temperature. It did get quite warm (48°C – I measured it!) after a few minutes with a 2.4-amp load, understandably given the high current load, but that was on the metal USB connector itself. The plastic surrounding the sockets was warm, but not hot enough to worry about. Some power packs I’ve tested have low-quality batteries and cheap voltage regulation circuitry result lead to a dreadful output voltage drop at high, or even not so high current loads. That’s certainly not the case with the Anker 20100 Power Bank, however. Even with a 4 Amp load, the voltage regulation is excellent, with the voltage only dropping to a measured 4.75 volts. That’s much better than I’ve seen on many similar packages, and the reality is that most of that drop would have been over the wires I was using. Skinny little USB cables are not designed for high current. I noted that at around 1.7 amps load, the voltage regulator stepped the voltage back up from around 4.95 back up to 5.05 volts. I’m guessing this is the advertised VoltageBoost features in action. For phone charging scenarios where a phone is drawing around 1.8 – 2-amp charge from this device, the regulator maintains a good voltage level to make charging your phone as quick as possible. It should be noted that this unit is a offers a fixed voltage, nominal 5-volt, output and does not use the Qualcomm Quick Charge protocols allowing higher power fast charging capabilities. Charging It's claimed that the unit will charge in about 10 hours with a 2 Amp charger. My timing of the charging cycle agreed with that. Given a quality 5-volt supply, i.e. a supply that doesn’t drop too much when pulling a high load, the unit pulled fractionally over 2 amps at 5 volts (I used a precision lab-quality power supply for the exercise) the pack reliably charged at around 9 hours 20 minutes. As advertised, the unit switched itself off when it reached its fully charged state. Clearly, the regulator is intelligent enough to sense when the internal battery pack is fully charged and switches the charging current off rather than allowing the pack to overcharge, potentially damaging the batteries, shortening their lifespan and overheating the pack. A nice touch. The charge state can be monitored with four blue LED indicators showing the condition of the pack. Measured Capacity Before I get to the figures, it should be understood that devices of this type use battery packs that supply a higher than the specified voltage to a power converter (buck type DC-DC converter). The converter then delivers a regulated 5v into the USB sockets. These devices are never 100% efficient. Power loss from heat generated in the converter, and even voltage losses in your cables can influence the perceived capacity of a power bank, so it shouldn’t be a surprise when the delivered power is a little shy of specifications. The Anker 20100 Power Bank uses six high-quality Lithium-Ion NCR18650B batteries, with a series connection of two groups of three batteries connected in parallel giving a nominal output of approximately 7.2. This supply is then run through the DC to DC buck converter to deliver power to the USB ports at 5 volts. Measuring the energy delivered in Watts (Watt = Volts x Current) over a time period, as opposed to a current (Amps) over a time period, a value that has no consideration of the voltage of the circuit being measured, is a much better way of comparing power packs, so that’s the value I’ll use here. To measure the energy delivered by the pack, I ran a number of tests to obtain capacity comparisons. In these tests, I connected the two USB ports in parallel to reduce the amount of heat generated by the circuitry and an additional test with maximum load on one port to test the limits of the device. I tested using a 1-amp, 2-amp, and 4-amp load, tracking the voltage, current and calculating capacity for a fully charged pack to the point where the output voltage dropped below 4.4 volts, i.e. when the 5-volt USB supply isn’t actually supplying 5-volts any more, even when rounding up the measured values. While I had set a cut-off point for the tests, the voltage output dropped from the nominal 5-volt output to 0 volts at the point of power exhaustion. That bodes well for the longevity of the device. More power could probably be gleaned from the batteries, but the regulator in the power bank is sophisticated enough to sense when the internal battery voltage is reaching its limit and switches the output off rather than allowing the pack to discharge to the point where the batteries become damaged. All of the tests rendered an approximate 60Wh energy transfer. Given that the specifications offer the capacity at 72.36Wh that gives us an approximate 84 % efficiency in delivering real-world power, which isn’t bad at all for this type of device. Summary I’ve tested a number of power packs over the course of the past few months and the Anker 20100 Power Bank has proven to be excellent. It’s physically a good size, is well built, charges quickly, and delivers the high current I need at a consistent nominal voltage in a package that offers high capacity for a reasonable price. It’s an excellent unit and I can highly recommend it.

This is my first portable charger, and searching the internet for the best one to get was overwhelming, so many to choose from, and all claiming to be the best! I decided to stick with Anker as their products have always felt like a quality piece of kit, nicely built and the finish is always aesthetically pleasing (verging on sexy!). They come with an 18 month warranty and customer service that’s second to none. The packaging with Anker products is always impressive. It's like opening up some ultra-expensive pressie. Sturdy box, inserts, instructions complete with a little mesh bags and a short quality micro USB cable (you need to purchase a short lightning cable if you have apple products) What is it? It's an external battery that you can use as a portable power source to charge stuff with. It has IQ, which means you don’t have to work out if it’s the right power to not damage your pride and joy. You charge the Anker PowerCore 20100 up from a wall outlet (which I did overnight), and when charged, it contains about as much power as seven or eight modern smartphone batteries. It has two USB output ports into which you can plug cords connected to the stuff (phones, Kindles, tablets, portable speakers, eCig batteries, the wife’s USB chargeable vibrator or whatever) you want to charge. Plug it in, push the button (which also tells you how much charge is left in the power unit by means of 4 blue LEDs) and it will charge your device super-fast, I won’t go into all the tech specs about amps and times etc. as enough people have already covered that. Just know that it charges fast, is reliable, looks good, feels solidly built and worth its weight in gold when needed. If you’re looking for something to stick in your pocket or handbag as an emergency back up for the phone, (in case you get lucky and don’t want to wake up “your new Friend” when you find your phones died and you need to get a cab to get the hell out of there) then this isn't the one, it has a lot of power so is fairly weighty and large, this is more for the weekend/week away where you can stick it in your holdall

The powercore has been a great device, although there is one small defect that I will explain. It was originally bought for use at festivals and was perfect for this purpose. The device supports fast charging and took about 90 minutes to give my phone a full charge and this would lose perhaps one of the blue charge level lights. I expected to get 4 full charges and still have enough for maybe another half typically, it could then be left to charge overnight with a festival locker and I had the ability to look after myself and friends all day. Admittedly it is quite bulky and heavy but that's the price you pay for it's MAH (milliamp hours), but you do get used to just putting it into an inside jacket pocket and forgetting about it. I found it totally durable as after 5 festivals during the season it had nothing more than a few light scratches and worked perfectly, even after some wet weather and some alcohol spilled on it. A quick wipe down and it was sound. I came to rely on it so much that I took it everywhere I went if I thought I may be away from a power point. Now we come to the issue. After a little over a year the device would no longer accept charge. Perhaps it was a fault in the usb socket or a short inside, I can't say, but after trying multiple charge cables and power bricks I was beaten. In defence I do believe the device had been used enough times to warrant a high use moniker, above what is typically expected. A quick email to Anker and after a serial number check they were happy to replace the device without hassle. They didn't ask for the previous device back, likely as it's not worth the cost of shipping. This approach may of been useful to find out what caused the fault and rectify it for newer models but c'est la vie. It took just 2 days to get the replacement and it's great to have the old friend back to rely on. Can't fault the service.

I have been using this the last 5 months and have found this battery to work quite well compared to other batteries I have owned. There are a few things I would like to point out though. 1. The battery does not charge with a current less than approximately 400 mA. This can be a problem as I tried to use with a solar panel and it refuses to take the majority of the output from it. I contacted Anker about this and despite the fact they sell solar panels, I got a response to the effect 'do not charge it using a solar panel'. if you try to charge off a TV or something, it will likely not work. 2. It will happily draw 2A from a source. Unfortunately, most standard wall USB chargers supplied with phones and other devices cannot handle this and will blow, unless you have a brand new phone with 2A quickcharge. The most reliable source I have used it by charging it directly from a Laptop USB point. Its impressive that it charges so quickly. 3. My my rough (and I mean rough) calculations the actual capacity of the battery is really in the range of 17000-18000 mAh. I used a DROK® Digital Ampere Voltage Multimeter to monitor the current over charging, and it is fully charged after about 9 hours at 1.92 A. This is still epic for the size of the battery. 4. The PowerIQ system seems to do a great job of regulating output when charging. I am often surprised how quickly it charges devices. On my phones it usually outputs around 1.2A. In all, it is still excellent value for money and I will continue to use it on a daily basis.

This is pretty much a must have for anyone who is out and about for long periods of time and want to keep their phone juiced up. This battery does a great job of charging up my phone and charged it up a lot faster than the previous power bank that I owned. So the first thing I have to mention mainly because it will be the first thing that you'll see, is Anker's packaging. They have some of the best packaging out there that blowed me away when I bought my first product from this company (I think it was a micro USB cable). Their boxes are extremely easy to open, are very nicely laid out and have a distinct look that will instantly let you know that it is an Anker product. In my opinion their product packaging is top notch and is on par with Apple's. Overall the design of the power bank is great. It has only got one button which is used to show how much battery is left in the power bank, via the four LED lights on top of it, and unlike in other power banks that I have used this bank automatically starts charging my device as soon as it is connected. It doesn't require holding a button to power it on or anything like that, it is intelligent enough to do that automatically. As for the feel of the power bank, it is plastic but it definitely doesn't feel cheap at all, it actually feels really premium and well made. I have dropped this product a lot of times and even though it does make for a pretty loud bang it has never got any dents or anything from the drops, so is very durable. This product also includes a travel pouch which is actually really handy because it not only protects the battery back, but also lets me slip the supplied wire into the pouch with it so I won't have to go looking around for a wire when I want to use the portable battery. As for the quality of the pouch, the pouch itself feels great to hold and does provide quite a nice amount of padding for the power bank but my one gripe with it is that the plastic part that is used to tighten the bag (sorry forgot the name for it) isn't that strong and I have had the one on my previous power bank break on me (this is my second one because I thought I lost the first one, after I found it I gave it to my sister and she still uses it up until this day). What I mean by it broke is that the top thin part of the plastic snapped so it was still usable but it obviously wasn't as effective as my current one now which is still in a good condition at the moment. Definitely don't let this put you off though, as long as you look after the pouch as a whole it should last you a long time, and it is definitely not a cheap feeling pouch to say that it was supplied for free alongside the power bank. As for battery life, I haven't counted exactly how many times I was able to charge my phone without charging the power bank but this thing lasts for ages. As for my last charge I think my bank had been used two or so times before I charged my phone yesterday and I was able to charge my phone from being completely dead at 0% to 100% and the power bank is now on three bars (out of 4) so yeah I does last ages and I am sure that I could get around 6 or 7 charges out of it before it would need charging again. Also on the topic of the power LED lights they do actually show through the pouch so if you know where the button is you can check the power without having the take it out of the bag, and the bag closes from the top of the power bank so you can plug wires into the bank and close the bag around them. Overall I am very happy with this battery bank, I would definitely recommend it to anyone that asks for a battery pack and will definitely be buying again from Anker whenever I need another one of these or a wire or something like that. I have already bought one of these for my mum's birthday and my dad bought one for himself when he looking for a new power bank. Note: Anker didn't pay for me to review this product and didn't supply it to me for me, I paid for this product myself and am just a very happy customer.

Purchased this product before travelling around Sri Lanka with friends for 2 months, and it was possible the best purchase I made before I left. I had previously used a cheaper recharging power unit, which had one or two recharges on an iPhone maximum, and felt like cheap quality plastic too. This on the other hand exceeded my expectations in every department. Design and Build: Whilst it isn't the most sleek of things to look at, it is far from the worst looking device on the market. The device is slightly large but not too big as to be an inconvenience, and can comfortable be carried in a bag. If you were wearing certain trousers you could get away with carrying it in the pockets, however it wouldn't be the most practical of options. The device is solid, very solid. As a result it's quite a heavy product for its size, however its unnoticeable when put in a rucksack. There are two USB ports, which was very practical for when both me and friend would need a device charging, or if like me, you have a tablet and a phone, where both need charging at the same time it is more than capable of doing the job. Charging: I was astounded at how good the charging was on this product. It charges devices faster than plugging them in to the wall socket! Not only this but I was amazed how much use you get out of it before it needs recharging, I think the maximum I got out of it was 9 or 10 charges of an iPhone which was below 5% power each time. In addition to this, plugging in a second device to the other USB port appeared to made no difference in charging speed to either device. Recharging the Anker itself can be quite a lengthy process if it has no power, and I've found it varies how long it takes to recharge. I have found it recharged in under ten hours at times and over 12 at other times, however the majority of the time it was inbetween the two. Conclusion; For the price this product is nothing short of incredible! Especially if your going somewhere where you will be away from an opportunity to charge devices such as a day out, camping, or staying in hostels or hotels where plug sockets may be limited. Due to the massive amount of charging it can do before it runs out of battery, it can easily be shared be friends and family. Highly recommended product, with all things considered such as prices charging ability, and design, it's hard to find a better product on the market at the moment.

Great charger, does 2-3 charges of my smartphone. Used in combination with an octopus cable I can charge several things at once when on the go. As a frequent solo female solo traveller having one of these is reassuring as I know that my phone won't run out of battery when I need it. It's a little heavy, but it does a great job.