2S-6S LiPo Li-Fe Battery 3in1 Balancer LCD Voltage Meter Tester 450mA Discharger - Black for DJI Quadcopter Multicopter RC Models Fits Li-Po / Li-Fe 2- 6 cell (standard voltage 7.4V - 22.2V) using divided voltage connector and receiver battery 1.2V-8.5V DC (no battery type limit, but need external power 7.4V-11.1V and use JST connector) The big LCD screen can show voltages of 6 cell batteries at one time. Supplies instant voltage reading and indicates abnormal cell immediately; Only 3 control keys for easy single-handed control Discharge function releases stored energy or electric charge from the battery in order to facilitate long term storage and avoid damage of battery; The balance function can be executed before / after battery charged, or during battery charging process Balance voltage setting range (lower limit): 2.0V-3.9V (pre-setting value 3.3V); Discharge voltage setting range (lower limit): 3.0V-4.2V (pre-setting value 3.9V); Discharge current (mA): Approx 450 (4.0V/Cell) Package included:- Battery Balancer Voltage Tester Discharger x 1