Inductive active balance board: Automatic start for more carefree Zero loss of energy transfer Compact layout for greater portability Low heat generation during balance All day uninterrupted voltage detection. Repair battery pack voltage - restore battery pack capacity - extend battery pack life. Balance principle: This module is fully automatic detection of adjacent neighboring cell's voltage difference to achieve balance, when the adjacent neighboring cell's voltage difference 0.1V, it automatically trigger the balancer to work: until the adjacent neighboring cell's voltage difference 0.03V, the balance ends. Balance current: balance current 0.5A-0.7A when 0.2V0.1V ; Equalization current when adjacent neighboring cells' voltage difference 0.2V: 1A balance current ; Sleeping current: 10uA for battery: li-ion /lipo/lifepo4 3.0V-4.2V per cell . Voltage balance accuracy:30mV difference between adjacent voltages (typical value) LED on: in balancing LED off: balance finished LED blinking: drop wires indication/circuit fault Sleeping current 10uA Operating temperature -20-+60 Colour:As Shown Material:plastic Package Contents: 1 * current balance module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.