Battery Lab

Want to know the real remaining capacity of your smartphone or tablet battery? Or maybe you’ve bought a new battery and want to check its actual capacity? Then this app is for you!

Battery Lab helps you:

- Measure the remaining battery capacity or check the real capacity of a new battery

- View battery capacity in Wh, charge cycles, temperature, and voltage

- Monitor charge/discharge current in real time

- Get notifications when the battery is low, reaches a certain charge level, or is fully charged

- Receive alerts when the battery overheats or gets too cold

- See charging current limit (if supported by your device)

- Display information in an overlay on screen

The app is optimized for minimal background power usage.

Before leaving a review or asking questions, please read the instructions and FAQ — most answers are already there.

Permissions explained:

• Storage access → for settings backup

• Draw over other apps → to display overlay information

• Launch at startup → so the app can auto-start after boot

• Run in foreground → required for:

- Battery info notification

- Logging charging history

- Sound alerts for power connection/disconnection

- And more features