When the electric quantity is less than 20%, the backlight will flash to alarm. Compatible Battery: Lead-acid battery, lithium battery, lithium iron battery (can be set up by yourself). Equipped with a.
Blue Light GY-6D PCB HTN Sound-light Alarm Battery Capacity Monitor Indicator
21750 21700 Battery Charger,LCD Intelligent 18650 Battery Charger 21750 21700 charger for 20700 22700 26650 26700 16340 (RCR123) 17500 17650 17670 18500 Rechargeable Battery with PCB Protection Board
PENGLIN 5PCS 1S 3.7V 4A 18650 Battery Charging Protection Board PCB BMS Protection Board for Li-ion Lithium Battery Cell
AEDIKO 8pcs 18650 Battery Holder 1/2/3/4 Slots 18650 Battery Holder with Wire for DIY Parallel or Series Circuit PCB Projects
4 Slots 21750 21700 Battery Charger,SUNLYTOUR 4 Slots Ni-MH AA 18650 Battery Charger 21700 Charger for 20700 22700 22650 26650 26700 16340 (RCR123) Rechargeable Battery with PCB Protection Board
6S 18650 Battery Board PCB 15A 22V 24V Charging Board
