请问16.4 0x03 BatteryMode()中的PB 和 PBS 这两个标志位是作用是什么？ 该怎么理解？
PB (Bit 9): Primary Battery
1 = Battery operating in its primary role
0 = Battery operating in its secondary role (default)
PBS (Bit 1): Primary Battery Support (R)
1 = Primary or Secondary Battery Support
0 = Function is not supported. (default)
