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Unless DeviceAdvancedBatteryChargeModeEnabled is specified, which overrides DeviceBatteryChargeMode, then setting DeviceBatteryChargeMode specifies battery charge mode power management policy (if supported on the device). To extend battery life, the policy dynamically controls battery charging by minimizing stress and wear-out.
Leaving the policy unset (if supported on the device) applies the standard battery charge mode, and users can't change it.
Note: If Custom battery charge mode is selected, then also specify DeviceBatteryChargeCustomStartCharging and DeviceBatteryChargeCustomStopCharging.