Usb power bank/charger

[Hammy]

Looks like it has potential.
Handheld Power Bank USB 18650 Mobile Battery Charger for MP3 iPhone 4 4S White | eBay.

 

[fishman]

Purchased, Thanks, Looks a handy little item.

 

[stryker]

I have one of these and it works great! However be AWARE.... there are some models around which use a questionable controller chip... some versions over drain the battery, others over charge but there all look the same case-wise, you only know when you check the PCB inside.

Sorry I can't find the thread right now but on some other forum there is a 10 page thread on these things, think its on a flashlight forum. Just google "power bank 18650" or something, you'll find it.

As for mine, I snipped off all the clips on the lid, glued some super small rare earth magnets to it and now it works great. I took the clips off as you will near wreck the thing getting the lid off!

 

[stryker]

Actually here is the link Review: cheap 18650 mobile power bank | BudgetLightForum.com

My exact model was not discussed so I used a multimeter and tested it discharging and recharging to be sure it was safe. At 99p from fleabay I can't complain.

 

[jacobprescott]

Schematics

Hello geniuses...

Does anyone know what the Circuit schematics for this would be, doing someone similar for a college project, would help a lot if anyone knew.

Thanks all.

 

[Hammy]

If you go to the link above there is a schematic further down the page.
Review: cheap 18650 mobile power bank | BudgetLightForum.com