Customer Ratings & Reviews

This is a great portable charger. It fits perfectly in the pocket in my backpack and it is light weight. I am able to get multiple charges which I love. I use it when I am out hiking and I need to charge my phone on the go quickly.

Portable powerful and reliable when you don’t have time to look for an outlet and you’re running all around and 95 hours of charge you can beat it. Highly recommend it.

I use this everyday and get multiple charges out of it. I have had it for 2 years now. It has been through the ringer and I'm still very impressed.

It has alot of battery life while also a resonable size (about the size of a cased phone) there are smaller ones than this but price to performance wise this is the sweet spot for me.

This thing is pretty amazing. It charges fast and it lasts as long as I need to charge things up when I'm out backpacking.

The power bank has sleek design. Charge speed is excellent. Price is OK. Use for my phone and some other devices. Work perfectly.

Purchased this 20K mAh charger to replace a 3-yr-old 10K charger to keep my Pixel 6 Pro phone alive on a 4-day backpacking trip. Tested it before the trip and it was able to fully charge the phone 3-1/2 times. It seems to take a long time to charge the charger (overnight), but that's been my experience with multiple chargers over the years.

Works great, charges fast and lasts a while before it needs to be charged up again. Very lightweight and fits easily in your bag.

This charger has been working for years, and the slick design makes it easy to toss in a bag or pocket while you're charging it. I used it for Disney

I've had mine a year and a half. It's taken tumbles and been on a lot of crazy adventures. Charges your phone quickly and charges up decently quickly too.

Good portable charger. Last a long time and not that heavy!

It’s an amazing charger! I bring it everywhere with me. It last around 3-4 days. The only thing that sucks is that it does take a long time to charge but besides that it’s a great charger.

Love this portable battery and wall charger. Enough juice to fast charge my iPhone 13 Pro x4, with power to spare for my Apple Watch and AirPods. The 4 LED lights make it easy to know how much battery you have left.

The Anker PowerCore III 20K is a compact portable battery pack that can extend the life your devices when you are on the go. The pack has a 20,000 mAh capacity and comes with a USB A to C charge cable and travel pouch. The charger has 2 standard USB ports and one USB C port. The USB C port is used to charge the device, but it can also be used as a supply port. The standard USB ports top out at 2.4A while the USB C port goes up to 3.0A. The design of the PowerCore is basic but well done. There’s a single button to interact with on top. The top case has a crosshatch pattern etched into the plastic that gives it a little texture and some grip. The rest of the body is smooth soft touch plastic. The 3 ports are located on one of the short ends. Overall, the body of the PowerCore is the same length as my phone, but a little narrower on the width and its thicker. Weight wise its kind of chunky – you will feel it if you carry it in your pocket. However, its not egregiously heavy, and it has the heft I would expect in a 20K battery pack. The single button has a couple of different functions. It has a ring of 4 tiny LED lights that act as a status indicator. Each light indicates a 25% charge capacity. If you press the button once it will wake up the charger. The charger has an autosensing function that picks up when a device plugs into it, so this is only necessary in a few cases. The one that comes up is if you have your phone plugged in and it hits a full charge then the PowerCore shuts down. However, if you don’t disconnect your device and continue using it the PowerCore won’t detect this battery drain. If you want to top your device back off you either need to press the button or disconnect and reconnect. If you double tap the button it sets the PowerCore to a trickle charge mode. With this mode engaged you can charge your lower powered devices like portable earbuds. Using the trickle charge mode extends the battery life of those smaller devices, so this is a nice feature. Using the PowerCore is as easy as it gets. Just plug in your device and it starts working. I picked up a 3’ USB C to USB C cable, which was honestly a pain to find but not really all that expensive. Charging my phone on one of the standard USB ports with the cable provide was estimated to take 2.5 hrs to reach full charge. Charging with the USB C to USB C cable cut my charge time down to 1.5 hrs. Buying the USB C to C cable is a worthwhile investment fore sure. You get the advantage of the 3.0A charging rate vs. 2.4A. If you plan to charge more than 1 device at a time then you charge rate will be cut down. The maximum output of the PowerCore is 3.0A. So if you plug in 2 devices then each one will get 1.5A. It will certainly take longer to charge, but if you really need to top off multiple devices then I don’t think you would care. Overall, this is a great little battery pack. Anker has been a mainstay in this product sector because of their solid design and reliability. I don’t see any reason to not take a look at the PowerCore III 20K.

This thing charges fast! The usb-c port charges devices more quickly and I love that it has a battery life indicator.

Rapid cell phone charging, handy during trips and power outages!!

Was able to charge my iPhone 13 from 20% to 100% twice before having to recharge it

I have been using this charger for over 3 months and i used it on a vacation it worked amazing the whole time it was able to charge my iphone atleast 5 times fully.

I love this battery i can charge my phone several times with it. It's perfect!

It’s a good portable battery if your phone is running low in charge. It’s support fast charging up to 18 W. And it’s good for a long day use of your phone.