It stop at 3.3V and start balance when cell 1 reaches 3.465V.
3S-4S choice Active Balancer only can used on Lipo/Lifepo4. Other new version as below can used all on lipo/lifepo4/LTO:
Capacitive energy transfer equalization board (high precision 5mv, whole set of equalization, not adjacent equalization)
Capacitive energy transfer equalization board
Working voltage 2.7V-4.5V, suitable for ternary lithium, lithium iron phosphate, lithium titanate.
Working principle, the capacitor fit transfers the charge carrier, and the balancing work is started when the balancing board is connected to the battery. The original brand new ultra-low internal resistance MOS, 2OZ copper thick PCB, balancing current 0-5.5A, the more the balancing current, the smaller the battery. Reserve the wiring position of the dormant switch, the operating current in dormant power-off mode is less than 0.1mA, and the equilibrium voltage accuracy is within 5mv!
The quiescent current is about 12 mA, it is recommended that the battery capacity should be suitable for batteries with 60-300AH!
With under-voltage sleep protection, voltage below 3.0V will automatically stop entering the sleep state, standby power consumption is less than 0.1 mA.