Customer Ratings & Reviews

Returned to Best Buy … failed to hold a charge in first two weeks!

This supplemental power supply is ideal for when you are going to be away from traditional sources of power for extended periods. With this battery, you will be able to recharge your phone several times before you deplete this battery. It is small, easy to carry and gives you both USB-A and USB-C options for connecting your charging cable.

This has stopped working after 6 months. Stopped taking a charge

Takes long to charge why promote this garbage and I lost my money

Does NOT stay charge! Returning to story for a refund

It's not working with me it's not very good battery at all

The Anker PowerCore III is an excellent way to bring some extra power with you on the go! It is light and easy to pack, and it allows for charging 2 devices at once! For its small size and portability it also provides a great amount of charges! I can charge my iPhone and iPad Pro and have power left over!

Battery won’t last too long even with 2 phone charging

Reasonable price and reliable battery. It's very slim and portable. The battery weighs 0.75 pounds. The box contains the battery, a small battery bag, a manual, and a USB-C power cable. I also like that the manufacturer warranty is 18 months instead of the 12-month industry average. I haven't used the portable battery to exhaustion, but it is advertised that it can charge an iPhone XS up to five and half times. I like to charge it after 70 percent usage. The battery itself has LED lights that indicate the battery percentage. A quarter percentage measures the lights. For example, one light is 0-25 percent, etc. There are four LED lights in total. I've never used Anker products, but this is a solid portable battery. I used it last week when I attended an all-day music festival. I had no problem. I plan to use this battery for future trips as well. The battery is a solid deal for the price. I would recommend it.

Before Covid I was often traveling to Vegas for technical conferences and having a portable charger wasn’t a luxury - it was a job requirement. I’ve lugged around plenty of them in the past to appreciate that Anker making these lightweight is a priority for road warriors. Having the charging status button on the front is a nice touch. If you’re lugging around older Apple charging cables having the 2 USA-A plugs is useful but if you’ve upgraded your charging cables with newer Apple technology they are now all shipping with USB-C to Lightning cables. The new iPads are USB-C and devices like the Nintendo Switch are USB-C. So while I like this Anker charger I find myself in more and more situations where I wish Anker had added a second USB-C charger to this device. Could they do that and ditch the second USB-A? Maybe. So think through if one USB-C is enough for your portable charging needs.

It is an amazing charger. I use it routinely. It charges my iPhone quickly and maintains a charge for awhile. My only issue is the usb-c connection for charging… makes it a little more hassle bc of special cord needed to charge this battery. I know iPhone has shifted to having a usb-c connection, so that shouldnt be an issue for the new school iPhone folks.

Great product charging power lasts for few cycle on my iPhone n sSamsung Only downside a but bit heavy Fast charging

I use this for concert days, i like to be up front so i show up REAL early. I can drain my battery down to 10%, plug it into this bad boy and get a full charge in less than an hour and only use 1 bar of its battery life. I recommend this charger to anyone like me who has days where it needs multiple uses in a charge.

I am so glad I got this power pack. I no longer have to worry if my devices will run out of power. It's great to have back up along with you incase your not around a power supply. The shape is plain but nice. Fits in your bag or pocket nicely. On one charge of the power bank you can get multiple charges for your phone. I've charged up my Bluetooth speaker and tablet as well, all before charging the pack again! Eliminate a bit of stress in your life with this simple battery pack.

The experience was seamless, no hassle at all when picking up. I was in the market for a battery pack for a trip to a festival and I wanted one that’s as reliable and long lasting. So far it was great good charge capability and easily portable not too bulky or huge for my needs.

Good for recharging devices with not having access to a wall or car charger. Can recharge my device 2.5 times before need to be recharged itself. Standby time is pretty good too so far. Also this is the biggest you can carry on an airplane safely. USB type c is nice but can't super fast charge like a wall plug. I have note 20 that I used on this. Charger battery bank.

I travel for work and use my phone a lot. As such, my battery tends to discharge quickly if it is not plugged in while traveling. I've had a few power banks over the years, from multiple different brands, to support my power needs. While this new 20,000 mAh power bank from Anker works, it's not top of the class in this price range. It also has a few things that just were minor annoyances. First, is the ports. While 15W output on the USB-C port is OK, it's not great. Others in the price range can put out 20W+ , allowing faster charging of the battery bank and the devices you'll be powering. 15W is also the edge for powering some USB-C devices. My Switch charged fine, but my laptop didn't even register it was charging, even though the battery was showing such. I'm also sad that micro USB is not on here. It's a small thing, but when I have a dying battery, options are nice and many other power banks still include this. Lastly, on the back, the lettering was done in a flat grey that can be barely read in regular light. Taking the photo actually allowed me to see what was printed there. Paying an extra penny for white ink would have worked much better. Now for the goods. It does include the vented bag which has become standard for these size power banks. It is smaller than my other 20k battery, but not by much. Maybe a 5% shrink in size and my other power bank is 4 years old. Anker included a short USB-C to USB-A adapter, which I guess is long enough to plug in to a charger, but really I would have liked to see a C to C cable included. It also has a slow charging mode for headsets. It's a neat gimmick, but without a voltage reader, it's hard to know what the power bank is doing. I'm guessing it defaults the USB-A ports to .5 amps, but a small device like that should be limited by what the manufacturer sets there input to. All in all, if you need a power bank in a hurry and have a BestBuy near buy, this will suit your needs. If you can afford to wait for something to be shipped to you, there are better options.

This is a great size charger with the ability to recharge your device several times over, whether it is a phone or a tablet. However, this does come with a couple of shortfalls. Size and Speed - This is a sizable battery pack at 6.5" x 3". However, the charging speed is not quick-charging. So, if you want to get a full charge, you're looking at 4+ hours (as it was for my Pixel 4a). This battery also stops charging the device when it is full. Results - So, this means that you're carrying around this sizable battery for hours at a time, or you're using it to charge over night. This is fine if you're camping and just need the charge, but with taking about 4 hours to charge and stopping charging when the device is full, your phone will charge for the first half of the night and discharge for the second half, leaving you with a less-than-fully-charged phone in the morning. It's a great device if you need to charge in one place for a while, or if you're fine with leaving your phone for a while (or are carrying a large purse/backpack). Probably not the best to charge with overnight or use with something requiring constant power (as I tried with a motion-sensor LED strip).

I used the Anker to charge my phone and watch at the same time and it's amazing how fast they were charged and how much battery life was still remaining. I can't find any issues so far. Must have product.

Like how I can charge my phone with my portable phone charger without having to plug it into an outlet.