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
Source Daly bms 3s 40a 18650 bms 12V de litio equilibrado protectora de la batería Placa de protección 40A pcm bms 11,1 V impermeable on m.alibaba.com