ChargerWhisper an Android app monitors cellphone’s battery level while charging. It alerts the user to unplug at the selected level. This prevents overcharging, reduces overheating & saves power. Strict Mode: The non-stop alert will repeat at the chosen level 80%, 90%, or 100%. Smart Mode: The alert will sound only 10 times. Alert stops when user unplug the charger or close the app. Note: The app must remain open or run in the background to receive alerts.