This balancer supports 3~4s batteries Lithium battery active balance energy transfer board Lithium battery active equalizer high-efficiency energy transfer balance. Capacitive energy transfer equalization board (high precision 5mv, whole group equalization, not adjacent equalization). Working voltage 1.8V-4.5V, suitable for ternary lithium, lithium iron phosphate, Working principle, the capacitive fit transfers the charge transporter, the equalization board is connected to the battery to start the equalization work, the brand new ultra-low internal resistance MOS, 2OZ copper thickness PCB, equalization current 0-5.5A, the more the battery is, the more the equalization current is Small, reserved for the dormant switch wiring position, the dormant power-off mode working current is less than 0.1mA, and the balance voltage accuracy is within 5mv The quiescent current is about 12 mA, and it is recommended that the battery capacity is between 60-300 AH. Wiring line length 30cm pure copper 22awg terminal wire High-precision energy transfer balance, balanced IC Balance indication: When the balance indicator is on, the balance work is turned on. The balance indicator goes out, the balance circuit sleeps, The balance indicator flashes, it drop cells, or the circuit is faulty. Type: A Material: Plastic colour: As shown Package Contents: 1 x 4S balance Board 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.