Li-ion/Lifepo4 /Lipo version: 1,Balance start voltage: 3.0V-4.2V 2,Balance termination voltage: 2.9V (into undervoltage sleep state) 3,Maximum Balance current: The whole group error is 0.1V1A; 0.5V3.5A; 1.0V5.5A (18awg 30CM cable test) 4,3S quiescent current Full state: (4.2v*3cell) 12.6V 12mA 5,4S quiescent current Full state: (4.2v*4cell) 16.5V 15mA 6,7S quiescent current Full power state: (4.2v*7cell) 29.4V 15mA 7,8S quiescent current Full power state: (4.2v*7cell) 33.6V 14mA 8,Whether external power supply is required: no external power supply is required, and the internal energy transfer of the battery is used to transfer and the entire set batteries pack in balance . 9,Working environment temperature: 0-60 degrees LTO version 1,Balance start voltage: 2.0V-2.8V 2,Balance termination voltage: 1.9V (into undervoltage sleep state) Maximum Balance current: The whole group error is 0.1V1A; 0.5V3.5A; 1.0V5.5A (18awg 30CM cable test) 3,5S LTO quiescent current Full state: 2.8v*5cell) 14V 12mA 4,6S LTO quiescent current Full state: 2.8v*6cell) 16.8V 15mA 5,Whether external power supply is required: no external power supply is required, and the internal energy transfer of the battery is used to transfer and the entire set batteries pack in balance . 6,Working environment temperature: 0-60 degrees Colour:As shown Material:PC+Metal Package Contents: 1 x 5.5A BMS 4S Active Balancer Board(with Protective Case) Only the above package content, other products are not included. Note: Light shooting 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.