BattAI: Battery Health & Life
Cait518 Tools In-app purchases
Battery health checker: score, capacity over time, charging habits, time to 80%
- Downloads
- 15+
- on Google Play
- Price
- Free
- In-app purchases
- Updated
- Oct 14
- 2026 · v1.1.2
Screenshots
About BattAI: Battery Health & Life
BattAI is a battery health and battery life checker. See how healthy your battery is, how your charging habits are shaping it, and an estimate of how long until its maximum capacity reaches 80%.
BattAI turns the battery data your phone reports into a battery health score you can understand, estimates how its capacity is changing over time, and checks your charging habits against established lithium-ion care guidance. It is a battery health check you can come back to, not a one-off test.
Battery health
1. Battery health score, and what shapes the score
2. Estimated maximum capacity over time
3. A rough estimate of when maximum capacity may fall to 80%
Charging habits
Charge care, charge range and charge rate show how the way you charge every day adds up.
Battery report
Create a clear battery report for service, resale or your own records. Choose the full report with the app's charts and text, or all of your data as a plain-text table.
Where the numbers come from
BattAI works from the battery data your phone reports: charge level and charging state, plus current, voltage, temperature and cycle count where your phone provides them. The health score, capacity and forecasts are calculated from these readings. Every result shows its source and limits, estimates are given as ranges, and missing data stays missing instead of being filled in. Sampling is limited, and analysis runs at most every five minutes.
The rules behind charge care
The fixed rules follow established lithium-ion guidance on deep discharge, long periods at high charge, heat and charge volume. No result promises extra battery life.
When it helps
Before a repair visit or before selling your phone, a battery report puts the history in one place. If you want to see how your charging routine lines up with lithium-ion care guidance, the charging section shows it in plain numbers.
Made for moments like these
- Deciding between a new phone and a battery replacement
- Showing a battery report before you sell your phone
- Checking how much capacity your battery may have lost when it seems to drain faster than before
Private by design
No account, no ads, no analytics and no tracking. Your battery history stays on your device unless you share a report.
Free and full version
Some features are free to use. The full version is unlocked with an in-app purchase.
BattAI turns the battery data your phone reports into a battery health score you can understand, estimates how its capacity is changing over time, and checks your charging habits against established lithium-ion care guidance. It is a battery health check you can come back to, not a one-off test.
Battery health
1. Battery health score, and what shapes the score
2. Estimated maximum capacity over time
3. A rough estimate of when maximum capacity may fall to 80%
Charging habits
Charge care, charge range and charge rate show how the way you charge every day adds up.
Battery report
Create a clear battery report for service, resale or your own records. Choose the full report with the app's charts and text, or all of your data as a plain-text table.
Where the numbers come from
BattAI works from the battery data your phone reports: charge level and charging state, plus current, voltage, temperature and cycle count where your phone provides them. The health score, capacity and forecasts are calculated from these readings. Every result shows its source and limits, estimates are given as ranges, and missing data stays missing instead of being filled in. Sampling is limited, and analysis runs at most every five minutes.
The rules behind charge care
The fixed rules follow established lithium-ion guidance on deep discharge, long periods at high charge, heat and charge volume. No result promises extra battery life.
When it helps
Before a repair visit or before selling your phone, a battery report puts the history in one place. If you want to see how your charging routine lines up with lithium-ion care guidance, the charging section shows it in plain numbers.
Made for moments like these
- Deciding between a new phone and a battery replacement
- Showing a battery report before you sell your phone
- Checking how much capacity your battery may have lost when it seems to drain faster than before
Private by design
No account, no ads, no analytics and no tracking. Your battery history stays on your device unless you share a report.
Free and full version
Some features are free to use. The full version is unlocked with an in-app purchase.