DIY USB charger ready!

[farzadb]

This post will help you.

Can you help me identify the pads for charging the battery?

I’ve seen the posts about a DIY charging solution but I can’t figure out which of the pads at the base are positive and negative and don’t want to assume there’s reverse polarity protection so does anyone know which of the pads on the base are + and -? I know it’s the two outside pins used to charge the battery but not the polarity . Picture attached. Thanks. [IMG_4386]