If you are checking China ips battery manufacturer and supplier, or solo wheel battery chinese factory, please feel free to contact M-Batt Electronics, we are always at your service. PCB specification： 1.This battery pack use A level PCB with SEIKO brand IC 2. With high capacity，support 15A constant current,MOSFET support High voltage or high internal resistance working condition. 3. IC with self-balance system on energy,the current can be adjustable.Real time Power voltage detection,support over charge, over discharge, and over current protection. Short circuit detection and protection function 5.Temperature detection and protection while charging the battery 7.Low power consumption, less than 5050uA 8.PCBA is corrosion resistance and water resistance, applies to different working environment. www.m-battery.com