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 BMS 11.1V 3S 10A BMS Battery Management System, for massager battery pack and 12V li-ion electronics
BMS 3S Balanced Charger for 3 x 3.7V Lithium batteries with protection :: Power Management :: Hobby Electronics :: Cricklewood Electronics