Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers overwhelmingly praise this power bank for fast charging, compact design, and the convenience of a built-in Lightning connector. Most highlight its ability to fully charge an iPhone in two to two-and-a-half hours and recharge multiple devices on a single charge. Many appreciate the slim, pocket-friendly form factor and sleek appearance. The unified Lightning cable design eliminates carrying multiple chargers, which reviewers describe as a major improvement. A small number report charging failures or slow recharge times, though most consider it an excellent travel companion.
Customer review summary generated by AI, including incentivized reviews.Very Happy!
Would RecommendLove it. Takes just a few hours to charge, but from 35% to full charge on my phone, took about 1/2 an hour. Charged my phone 3 times before it was down to one light. Would definitely recommend!
From belkin.com
Lightweight and reliable
Delivers a quick charge and you can always count on it when you need it!
From anker.com
Worst Product Information EVER
I am fairly tech savvy but even for me this product didn't deliver. NO DIRECTIONS at all other than mandatory warnings which any 7 year old knows by now. Reason enough not to purchase.
From anker.com
slim good quality, lasts a while
My old Anker powerbank was bought back in 2015 and has finally started being not as efficient (goes from full to half- after being used once) so I decided to update with this new one. Super slim, came in a nice soft bag, and charges my phone super quick. The only thing I'd nitpick on is that the lights to indicate power are small and while unobtrusive lights are good, it always takes me a minute or two to figure out if it's charging or the battery level.
From anker.com
I love it, it's great.
I love it, it's great. I can charge my Op9 Pro in a bit over an hour. Only lights are a bit confusing and not accurate.
From anker.com
Great purchase for being out and about all day!
Would Recommend[This review was collected as part of a promotion.] It's very convenient! Did a whole day of sightseeing and doing tourist things and was able to keep my phone and earphones charged up for the entire day letting me get the most out of taking pictures and video! Great buy!
From belkin.com
quality unit , chrges a bit slow , was kinda hard to understand at first
excellent quality , for yrs of use i see. initial use was hard to figure out, could use a usb plug , as its still in our stuff . not easy to understand what i was buying at first. i hav other anker i love this is #2 because of the plug mix here
From anker.com
Long and quick power
Would Recommend[This review was collected as part of a promotion.] Last a long time and charges quick and my daughter loves the color
From belkin.com
Great capacity and fast charge
Really good. Wish they made one a hit smaller though.
From anker.com
PowerCore Slim
What a great charger! Not only is it easy to carry but it boasts plenty of power for its size. Highly recommend!
From anker.com
Extremely useful!
I haven't used many power banks, but now that I go out a lot, this has saved me many times. I don't have a lot of problems, besides that it takes a bit too long to fully charge, especially considering I have one of the newer models of the OnePlus chargers. This isn't a huge problem for me though.
From anker.com
Fast but slippery
[This review was collected as part of a promotion.] It recharged quickly, just a few hours. The outside is a little slippery, so be careful not to drop it.
From belkin.com
Great lasting power
[This review was collected as part of a promotion.] This has great lasting power and also looks pretty neat!
From belkin.com
Great power source. Handy size.
This is my 2nd purchase of Anker PowerCore Slim. It will charge my Samsung 5g twice with power to spare. It works great and is an easy size to carry around. I was expecting 3 ports (C, USB, and micro), but I guess I'll get used to not having a micro port. I was disappointed it doesn't have a textured case like the previous one I purchased. This case is very slick, and it's hard to hold onto. Love the olive green color, though, and the little carrying bag. Would've been nice to have a USB cable t...
From anker.com
Convenient power bank, but short on charge time.
[This review was collected as part of a promotion.] It is a handy device… just doesn’t deliver on the advertised charge time. I plugged the PB10K into my 5G iPad with screen on, mostly idling, and it lasted 6-1/2 hrs, not the 17 hrs that Belkin’s description stated. It took 5-1/2 hrs to recharge from depleted state. It is very nice though to sit at the kitchen table and work many hrs without having to drag out a extension cord.
From belkin.com

Hi, We appreciate your feedback, but we'd love to assist you with this. We can try charging the power bank using a different charging cable. Even so,...