Battery

Battery Health & Life Checker is a free Android app with ads and in-app purchases that shows battery health, voltage, technology and temperature. Several reviewers complain about the ads, and several call its battery…

CPU/GPU/Battery Monitor puts CPU load, temperatures and battery charge rate in a permanent Android notification. Several reviewers like it for watching temperatures; many say GPU data doesn’t work on their phone.

OneBattery is a free Android battery monitor with ads that shows live amps and watts, battery health and a charging screen for the always-on display. A few reviewers use it to test chargers and…

Battery Charger is a free Android battery monitor with ads that shows charging speed in watts, amps, voltage, temperature and estimated charge time. The listing names no charge alarm, and two reviewers say its…

Battery Alarm PRO is a $2.49 Android app with no ads that speaks or rings when your battery reaches the low and high levels you set. Several reviewers have used it for years; the…

AccuCharge is a free Android app that shows live charging current and watts on an AMOLED-style charging screen and always-on display, with ads and a paid upgrade. Several reviewers think it speeds up charging,…

Battery Guru is a free Android battery monitor that estimates capacity and health, measures charging current, and adds alarms, widgets and an always-on display. Several reviewers praise the detail; the common complaints are ads,…

Thermal Monitor is a free, ad-free Android app that shows your phone’s temperature and throttling state in a floating widget, with a one-time Premium upgrade. Several reviewers use it while gaming; several say they…

Full Battery Charge Alarm is a free Android app that rings when your phone reaches a charge level you set, with an optional low battery alarm. Several reviewers use it to stop overcharging; many…