4S 30A BMS protection board. 4S means 4 battery or 14.8v voltage.
The battery charge is switched off when the each battery voltage reaches 4.25 – 4.35 V, and the discharge when the voltage drops to 2.3 – 3.0 V. This BMS module comes with Over charge protection, Low discharge protection.
4s 30a 16.8v 18650 Lithium Ion Battery Balanced BMS Protection Board Circuit
Product Dimensions - 65 x 50 x 4 mm
Item Weight - 18grm
Country Of Origin : China