I find myself in need of welding 40 18650 cells into a pack to rebuild a dead pack. It seems the normal method of doing this is spot welding the batteries together with thin nickel sheet. Does anyone ...

Raise you’re hand if you’ve ever soldered directly to a battery even though you know better. We’ve all been there. Sometimes we get away with it when we have a small pack and don’t care about ...

There was a time when every gizmo on AliExpress also had a big white LED so it could also work as a flashlight, but maybe the power bank is the new flashlight. [Aaron Christophel] has a battery spot ...

Greetings. I have an older Black & Decker string trimmer. It's 40V lithium Ion, 2AH. (LBX2040) The battery will charge fine, show 3 lites (full charge) on the battery indicator, Plug it into the ...