Customer Ratings & Reviews

It like it but sometimes the charging doesn’t work

This product is small but powerful. It fits easily in my backpack and works very well charging 2 devices

This wasn’t bad but wish it jus had cables built in

Both the product description on the website and the product box state that there is a travel pouch included. However, there is not a travel pouch included. Need to properly represent the product being sold.

Came in quite handy during recent road trip. Able to use my tablet for 8 hours thanks to this device.

Bought as a gift, keeping the iPhone attached to it charged at 100 percent despite constant game play on many apps. Great value for the money. Would buy it again.

This battery pack is capable of fully charging my iPhone 14 and AirPods multiple days in a row.

Nice divices thanks for everything I really happy I come back for shipping some more stuff

Disappointing. It has less power than my other Anker Power Bank and doesn’t charge very well. I thought I was upgrading and I downgraded instead.

A great power bank. We use it to keep an iPad Pro charged all day and it works great.

Easy to use works well you get at least 3 full charges on dead cell phone battery

When it worked it worked well for about 4 months, with 3 charges for my phone on the battery. But it stopped working and just a month outside the return window, which is unacceptable for a 50 dollar power bank. Very disappointing as I feel like anker products used to be better quality.

Excellent charger. This works well for my entire family when we are traveling.

I only used this for 3 months and then it broke i dont suggest this.

excellent device it allows me to charge my phone 3 times before it drains

convient for trips or just around the house when u need an extra charger

The unit does it's job quickly and efficiently - assuming you already know how to use one. The absence of instructions made it a challenge for the recipent who received ite as a gift.

Nice product. Simple to use. Get a case for it. Works like an SD card

I was happy with my current Anker portable charger, but it didn't charge too fast and we could get a charge for 2 phones, and possibly have some left over. That worked, but I just always felt that it could be better. This Anker - PowerCore III 20K mAh fixes everything that I had issue with on the older power bank. It's the USB-C port that does it. Not only can you charge up the bank faster with it, but I can use the extra USB-C Apple cord that I have. I have a iPhone 13 Pro and the battery last very long. But without the faster charging, it can take a while. I plugged it in using the USB-C Apple cord and in 30 minutes it was at 50% and in an hour, it was at 80%. My old portable would have charged about half as fast. I later tried my Apple watch on it, and it charged about as quickly as it would being plugged in the wall. It has a trickle charge feature by tapping the indicator button twice that slows the charge for things like watches and earbuds that don't need the higher charging rates. This was after fully charging the power bank. It still had 4 blue lights, indicating that the charger has more than 75% capacity left. After another charge of the phone and then it sitting for a few days, it still shows 4 blue lights. One thing to note that should not come as a shock, it took over 8 hours to charge up the charger itself. It's 20k mAh, so you shouldn't be surprised. But if you're unfamiliar with batteries, that high of a capacity will take a long time. Just be prepared when traveling to charge it overnight if you deplete it. Based on my usage, I could have charged my phone 4-6 more times. Definitely worth the money and performs great. Highly recommended.

The packaging describes the Anker PowerCore III 20K charger as “ultra-light” and “fits neatly in palm or pocket”. I would disagree. It weighs more than 12 ounces which is 3 times heavier than my phone. It’s all battery so the weight makes sense, but it’s too heavy to hold for very long or to carry in my purse or pocket. It has 2 USB-A output ports and 1 USB-C dual function input/output port. The USB-C port is used to charge the Anker battery, and once charging is completed, the USB-C port can be used to charge a phone or other device. I only have two devices - one that uses the USB-A port and one that uses the USB-C port - but it appears that 3 devices could be charged simultaneously. It comes with a carrying bag and an 18 month warranty. It has a trickle charger setting for devices with low power draw, like earbuds and smart watches. To activate trickle charging, the power button is pressed twice or held in for 2 seconds. A green LED light indicates trickle-charge. The Anker PowerCore III battery is said to charge in 4.5 hours when using a USB-C power delivery wall charger. Using the included USB-A to C cable and a standard wall charger, it took 9 hours to charge. That’s less than the manufacturer’s estimate of 10+ hours. There are 4 LED lights on the battery to indicate charge level. When 4 blue LED lights show when the power button is pushed, the Anker is fully charged. As it's used, the number of blue lights decrease from 4 to 1 (25% charged), making it easy to tell when it's time for a recharge. After a full charge, I let the charger sit for 4 days to see if the charge level would drop when on, but not being used. It still had 4 LED lights on day 4. I have an iPhone that I use to take a lot of pictures of items for sale. Taking and sending pictures takes a toll on the battery. With heavy usage, I have to charge it a couple of times a day. I tried using the iPhone with its charging cable attached to the Anker battery. The phone battery life dropped quickly (as usual) but as soon as I stopped taking and sending pictures, the battery went from 75% to 100% charged in about 30 minutes. It seemed to charge faster than with the wall charger. The package indicates a potential for 92+ hours of charging. As of today, I’ve used the Anker PowerCore III to charge my phones 10 times (13 hours maximum) and I have 2 LED lights remaining on the charger, indicating that 50% of the charging capacity remains. Based on that, the 92+ hours estimate may be a little optimistic. But I have no complaints. I normally would be doing most of the home phone charging using a wall charger, and only use the Anker charger when traveling. At this rate I won’t have to charge the Anker PowerCore III more than once a month and I can put it on the charger at night and have it charged up in the morning.