4S 16.8V Battery Charger BMS Balancing Boards

HIGH CLASS MATERIAL This battery balance board is made of high quality material that can withstand long-term use.
Simple structure: the battery balance board is easy to install in structure and convenient to handle.
GOOD CRAFTSMANSHIP This board enjoys good workmanship, which ensures a long service life.
PROFESSIONAL USE This board is designed for current and voltage compensation, efficient and reliable.
Small Size The balancing board is small and convenient to use.
Specification:
Color:As picture show
Material: metal
Size: approx. 2.6 x 2.0 x 0.2 cm / 1.0 x 0.8 x 0.1 inches.
Balance current: 66mA
Balance voltage: 4.2 V.
Box contents:
1 x battery balance board.