DIY Power Bank 8 x 18650 Flat Head Battery Charger,2 USB Output Ports Plastic Shell Box with LCD Display,Micro/Phone/Type-c Input Port Power Bank Box with Flashlight (Dark Black)

I grabbed this and a generic laptop battery for an asus laptop (just because all 8 cells were in a straight line which makes it easier to rip apart for the cells.) And I stuffed them in this SLIM box, probably 2-4 mm thinner than my old 8*18650 box, whose ports are wearing out now after 5 years of reliable work! So i saw this looked as if it was from a similar company. Rolled the dice and it works great. The usb C is an input only but works well with 5v 2A cell phone chargers, just watch out it isn't Qc or QI so no quick charging it or you will zap it with 12v which is bad lol... anyway good solid micro usb which i thought would be handy i haven't tried the lightening input yet but if its like the other 2 its good to go. I did a test with two 5v testers and i got 4.3 amps out of the two outputs and it did warm up but it didn't over heat or drain faster than expected. So it maintains a good conversion even while running two 2amp outputs. while my old one only did 3 amps and would overheat after about 20 mins, so i rarely ran it over 2 amps so this is a massive upgrade for me. Id say the biggest downside is it doesn't reopen without a lot of shims and time. It has small D shaped clips that are about ever 2 cm's down the seem. So yeah, pick a new battery and don't expect to trouble shoot it after its together, but the descript explained that. TLDR: Great, works at 4 amps consistently. Can charge two newer phones but not Qc or QI not even to charge it. But It does a great job and will probably be a life saver in air ports post pandemic!

Works good, great to repurpose old lap top batteries

Was cool and worked to charge but refuses to charge just sits there saying in what a waste i put good cells in there too-.-

Of the three power packs I have this is my favorite. I use while I'm doing bike deliveries so it needs to be either cheap or sturdy. So far this has been both. When using all slots I get a lot of life. Footprint is minimal and clear. Appreciate the batteries in parallel so I can steal them for other tools that use the wonderful 18650 cells. The build quality is poor. When first purchased there was some plastic that needed to be removed. Even then the case did not fully close on all sides. Plastic is very brittle. Even on the first close a few of the clasps snapped off when trying to close. Different plastic or latch design would greatly add value. In my opinion this is aesthetic issue and I'd rather be able to open and close (clearly goes against the design). I used rubber bands to keep it closed. Ended up being a handy way to keep the charging cable nearby. Anticipate rubber bands will prevent future cracks as well. Had I spend more than $20 on this I would be disappointed.

Works but the it arrived with a faulty display. It cannot display all numbers correctly as it has dead pixels