Hi, this is a 3S 40Amp BMS that I've used for my 12V power bank that utilizes car 12v chargers to charge my stuff. Basically a 3s9p configuration for for 18650 2500mah
3S 40A Lithium Ion BMS - For 11.1V Battery With Protection - KTRON India
3S BMS BLUE 3S 12V 10A 18650 Lithium Battery Charger Module 11.1V 12.6V 10A Charge Discharge Current Short Circuit Protection Function Battery Management System - Udvabony.com - Electronics, Sensors, Robotics Online Shop