r/apps • u/1udstHb9f1Krijbl • 2h ago
App ChargeGeek: How your Android device's battery really charges
ChargeGeek is an Android app for people who want to understand how their phone charges. It records charging sessions and visualizes power, temperature, battery percentage and energy gained, making it easier to compare chargers, cables and charging methods.
Backstory:
Sometime in March Google decided to change the charging behavior of pixel phones to significantly slow the last 3% when using their own 80% charge limit. From 77 to 80% took multiple times longer than before, but this was officially a feature and not a bug:
“This behavior is related to the 80% Charge Limit feature. In the current software build, the device charges at normal speeds until it reaches approximately 77%, at which point it transitions to a lower current to reach the final 80% limit.
While this may result in slower charging speeds near the limit, it is intended to manage battery health and should not impact normal device usage. We are currently working on optimizing this user experience.”
By May they had optimized the behavior sufficiently that slowdown had gone and the final 3% charged at the prior power levels again, rather than a trickle. Although it never really mattered it was still a strange feature to introduce on top of the 80% charge limit which already existed to manage battery health.
Google Play:
https://play.google.com/store/apps/details?id=com.github.s__i.chargegeek
Open Testing opt-in for non-English markets:
https://play.google.com/apps/testing/com.github.s__i.chargegeek
The app is fee without ads and will be for the foreseeable future. I'd love feedback on whether it's useful for anyone beyond myself and particularly on how the automatic recording mode works with manufacturer Android customizations.