Capacitive Energy Transfer Balancing Board (High Accuracy 5mV, Full-Cell Balancing, Not Adjacent Balancing). Operating voltage 1.8V-4.5V, suitable for ternary lithium, lithium iron phosphate, and lithium titanate. Working principle: Capacitors transfer charge quickly, and the balancing board begins balancing as soon as it is connected to the battery. It uses a -, ultra-low-resistance MOSFET and 2oz copper-thick PCB. Balancing current 0-5.5A, with the current decreasing with larger battery sizes. A dedicated sleep switch connection allows for operating current less than 0.1mA in sleep mode, with balancing voltage accuracy within 5mV. Quiescent current is approximately 12mA, and batteries between 30-300AH are recommended. Undervoltage sleep protection automatically shuts down the board when the voltage drops below 3.0V, and the standby power consumption is less than 0.1mA. Color: Black Material: PCB Package Contents: 1 set x 8s Active Equalizer Balancer 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.