adb shell dumpsys battery

The adb command dumpsys along with argument “battery” provides the current state of the battery in our android device and this command “adb shell dumpsys battery” can also be used simulate the different scenarios during the testing of the device.

$ adb shell dumpsys battery

Above command when run on our mobile provided below important information about battery.

Current Battery Service state:
  AC powered: false
  USB powered: true
  Wireless powered: false
  Max charging current: 0
  Max charging voltage: 0
  Charge counter: 4236000
  status: 2
  health: 2
  present: true
  level: 70
  scale: 100
  voltage: 4034
  temperature: 311
  technology: Li-ion
  batteryMiscEvent: 65536
  batteryCurrentEvent: 0
  mSecPlugTypeSummary: 2
  LED Charging: true
  LED Low Battery: true
  current now: 430
  charge counter: 4236000
  Adaptive Fast Charging Settings: true
  Super Fast Charging Settings: false
FEATURE_WIRELESS_FAST_CHARGER_CONTROL: true
  mWasUsedWirelessFastChargerPreviously: false
  mWirelessFastChargingSettingsEnable: true
LLB CAL: 20230417
LLB MAN: 
LLB CURRENT: YEAR2023M7D23
LLB DIFF: 14
  mSavedBatteryBeginningDate: 0
SEC_FEATURE_BATTERY_FULL_CAPACITY: true
  mFullCapacityEnable: false
FEATURE_HICCUP_CONTROL: true
FEATURE_SUPPORTED_DAILY_BOARD: false
SEC_FEATURE_BATTERY_LIFE_EXTENDER: false
SEC_FEATURE_USE_WIRELESS_POWER_SHARING: false
BatteryInfoBackUp
  mSavedBatteryAsoc: 97
  mSavedBatteryMaxTemp: 900
  mSavedBatteryMaxCurrent: 3417
  mSavedBatteryUsage: 6215
  FEATURE_SAVE_BATTERY_CYCLE: true
  SEC_FEATURE_PREVENT_SWELLING: false

Using “dumpsys battery” command to simulate during testing

Simulate Changing of battery level

$ adb shell dumpsys battery set level 50

Above command will set the battery level to 50% irrespective of what is the actual battery level i.e. it simulates the battery percentage to the value you want to test. This is useful during UI testing.

Once we set the battery level using above command, we can reset the value to actual charged percentage using below command,

$ adb shell dumpsys battery reset

Simulate Battery Unplugging / Removal

$ adb shell dumpsys battery unplug

Simulate Android device being removed from USB Charging

$ adb shell dumpsys battery set usb 0

Test how the device behaves under low power conditions

$ adb shell settings put global low_power 

Once you have finished your testing, you can undo your manual device settings with this command:

$ adb shell dumpsys battery reset