BattAI: Battery Health & Life

Free: Battery health score, what shapes the score, maximum capacity over time, charge care, charge range, charge rate Unlock: All BattAI features with an in-app purchase BattAI is a battery health and battery life checker. See a battery health score, how your maximum capacity has changed over time and an estimate of how long until it reaches 80%, plus charge care and charge range insights. Create a clear battery report for service or resale. No account, no ads and no tracking. Made for moments like these - Deciding between a new phone and a battery replacement - Showing a battery report before you sell your phone - Figuring out why your battery drains faster than before Battery health score - A 0–100 score in five levels: Excellent, Good, Fair, Needs care, Service check - What shapes the score: capacity 40%, cycle count 25%, device age 10%, heat exposure 10%, charging habits 15%, with the main factor called out - Add maximum capacity yourself anytime, and cycle count if your phone doesn't report it; the more you add, the more detailed the results Capacity trend and 80% estimate - Maximum capacity readings on a chart with a 95% confidence range - Monthly capacity change shows how fast battery wear builds up - An estimated range of months until 80%, to plan a battery replacement or a new phone when battery life starts to matter - The 80% estimate needs at least 3 maximum capacity readings spanning 30 days or more Charge care - Every charge gets a 0–100 charge care score from start and end level, charge rate, time at 100% and more - Charge range (for example 30% to 88%), duration and charge rate: Slow, Typical, Fast or Very fast - Habits scored one by one (discharge depth, charge ceiling, overnight charging, heat while charging, frequency), with tips such as using 80–90% when it suits you Reports - Create a clear battery report for service, resale, or your own records. - Full report: the app's charts and text - All of your data as a plain-text table Sources and limits - BattAI uses public battery APIs: battery level, charge state, Battery Saver mode, whole-device thermal state and time, plus current, voltage, temperature and cycle count where your phone provides them. Other results are calculated from those readings or added by you. Each detail shows its source and limits. - Sampling is limited, analysis runs at most every five minutes, estimates use ranges, and missing data stays missing. - Heat uses the whole-device thermal state, and battery temperature where your phone provides it. - Scores and estimates are calculated ranges, not official or manufacturer values, and not a promise of how long your battery will last. - 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. Free and full version - Some features are free to use. The full version is unlocked with an in-app purchase. Privacy - No ads, analytics or tracking. - BattAI has no account or telemetry. Data stays on this phone. Understand your battery over time.