DIY Power Bank - Make Your Own External Battery Pack,2 Output 3 Input (Mirco,Type C,Lighting) - Battery Not Include (Black)

It's ideal for a DIY person like me.This is a convenient way for me to use my leftover 18650 cells from other projects.I made sure my 18650 cells were the same voltage and installed them into the case.I tested and verified the assembly before I attached the lid.I checked the basic functions, then completed the assembly.I am satisfied the pack works as expected.I like the convenience of assembly and the simplicity of use.This is an ideal way to make something useful from leftover 18650 cells.

Finally found a product that I can reuse my loose 18650 batteries. It's great that I can pick and choose the best batteries out of the bunch for my battery bank. It charges great, although not the fastest but fast enough. A little over 2 hours for my Samsung S21. Recharging the battery bank is a little slower, but that's to be expected since it's recharging 8 higher capacity batteries. It took a little over 3 hours to charge from 50% to 100%. The only negative is that once you put the cover on, it's basically on there permanently so you'll have a hard time replacing the batteries once they get old.

Great way to use up 16850 extra batteries, ease of use, extra little light, Price, and screen info.Only warning is to test your Power bank before installing cover as cover is not designed to be easily removed. I bought one, then another one to use up my expensive batteries. Wish USB C could send power out, but a USB adapter cable that goes from A to C or A to lighting works great. If I had more batteries, Would purchace again

Word of advice. Only add good cells that charges to 4.20 as once the case is closed that's it!Pity is that both USB-C ports can only be used to charge the powerbank (in). One should have been a charging port (out)

This thing is junk. I bought it to use as a bank charger for my 18650 batteries. The batteries won't even fit in it without distorting the case. The case gets so distorted that the cover won't fit with one battery installed. One position will not even fit a battery.

I have around 15 of these black and blue, love them

Bought a bunch of these through temu and they are out of stock there so bought this one here. The difference between this one and the ones at temu is that this one snaps together and so the cells you put into it, be sure they are healthy and wont need to be swapped out in near future, as the 6 that I bought through temu had screws to screw them shut and if needed unscrew to replace failed cells.

Day 1 use is pretty good. Little finicky putting the cover on, but otherwise works well. I scrap laptop batteries and damaged power banks, leaving me with a lot of 18650 batteries with plenty of life still in them. This makes it quite easy to give them another purpose in their life. It is possible to remove the cover using plastic shims and prying tools should you need to remove, replace, or test individual 18650 cells.I'd recommend doing a charge/discharge test on the cells to get their voltage and capacity prior to installing them. Not all 18650 batteries have the same capacity, it helps to match them and gives you an estimated capacity of the DIY battery