17S 20S 21S 5A Capacitor Active Equalizer Balancer LFP Lifepo4 Lithium Lipo/Titanate LTO Battery Energy Transfer Active Equalization Module Faster Whole Group Balancer Board

Usage Tips: The voltage difference between each battery must be within 0.5V. If the battery voltage gap is not more than 0.1V, the indicator light on the balance board may be triggered erroneously. This light signifies no active balancing current, and it will turn off automatically after some time. Reconnecting the cable is recommended to address this. Please note that voltage equalization requires time; the board becoming warm is typical, and balancing does not commence instantly after connection. Working Voltage: 1.8V-4.5V, suitable for NCM Ternary polymer lithium battery (Li-ion), lithium iron phosphate battery (LiFePO4), and lithium titanate battery (LTO). (Batteries are not included.) Working Principle: Employs a flying capacitor charge transfer technique. The balancer board connects to the battery to initiate balancing, featuring original ultra-low internal resistance MOSFETs and a PCB with 2-ounce copper thickness. Balance current ranges from 0 to 5.5A. A dormant switch wiring position is reserved; in dormant power-off mode, the operating current is below 0.1mA. Balance voltage accuracy is within 5mV. The quiescent current is approximately 7mA. Recommended battery capacity per balancer is between 30-300AH. High-capacity batteries can be connected in parallel with multiple equalizers. Features under-voltage sleep protection. By detecting only the B1 battery voltage, the equalizer automatically halts and enters sleep state when B1 voltage is below 2.7V for NCM/LFP or below 1.8V for LTO, with standby power consumption under 0.1mA. IMPORTANT: Before connecting the balance cable to the board, verify all connections within the battery pack are correct and properly insulate the bottom of the board and all battery string connection terminals to prevent short circuits and board damage. Note: This balancer board is backward compatible by default. For instance, when used for a 20S configuration, the last line B21+ remains empty