10 PCS 1S 3.7V 18650 BMS Board 3A w/ Nickel

10 PCS 1S 3.7V 18650 BMS Board 3A w/ Nickel Safe and simple 3A protection. Use quality 18650 cells for best performance. 2S 8.4V 20A BMS Board w/ Balance. Safe and simple 3A protection. Tip: Always verify polarity before welding.