Dears:
We have some problems when using BQ24610 to charge 4 batteries:
1. Remove the battery, VBAT will still output 16.8V. Normal BATFET should be turned off.
2. When the adapter current is 40mA, the charge complete LED have not lighting.
3. When the actual battery voltage is 16.4V, the battery will switch from fast charging mode to constant voltage charging mode. Normally, it will switch in 16.8V.
We use the reference design of EVM Board, the schematic diagram is as below.