PCB wiring question

[Jacobpac]

I have a PCB that has a B+, B-, and a P-. I dont see a P+. Would that be the back of the circuit board?

Question 2: any reason not to use a 5000mAh lithium ion battery. TCSS sells the 3400mAh. Why not a 5000mAh?

[NanoRex]

Check the datasheet for the PCB you have to make sure, but the most likely case is that B+ is meant to act as both B+ and P+.

3400mAh is the highest actual capacity you will get in an 18650 sized battery. If you see an 18650 cell rated higher, it's likely a fake rating. If the cell is larger than an 18650 and you have the room for it, go ahead.

[Jacobpac]

thank you for the reply.

The only info available is listed on product description. It states the back of the board is P-. However there is a P- solder point on the top. The only one missing is P+. I'm thinking this maybe a misprint. The info is from an Amazon product description. Your answer makes more sense though..

[Jay-gon Jinn]

B+ and P+ are usually the the same pad on 3.7v pcb's.