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OnePlus could soon automatically cap battery to 80% to slow down aging (Update)

The new feature could arrive with Oxygen OS 15 later this year.
By

Published onJuly 2, 2024

oneplus 12 back hero
Ryan Haines / Android Authority
TL;DR
  • OnePlus is working on a new battery health feature that will automatically turn on battery charging protection when your device has been charging for too long.
  • We’ve spotted code related to the in-development feature in the latest Android 15 beta update for OnePlus devices.
  • The feature aims to slow down battery aging when users charge their devices for extended periods.

Update, July 2, 2024 (11:00 PM ET): The original version of this article erroneously focused on the battery charging limit as the new feature. However, that is not new, as users can already manually toggle the charging limit as per their needs. The new, upcoming feature is that this 80% battery charging limit will turn on automatically (without user input) if the device has been charging for too long. The error is regretted, and the article has been updated to correctly reflect this change.


OnePlus is working on a new battery health feature that could roll to users with the Android 15 update. The feature will automatically limit charging to 80% when a device has been charging for extended periods.

An APK teardown helps predict features that may arrive on a service in the future based on work-in-progress code. However, it is possible that such predicted features may not make it to a public release.

Code spotted in OnePlus’ second Android 15 beta release (h/t: 1NormalUsername on X, formerly Twitter) points towards more changes coming to Oxygen OS’s “Charging Limit” feature.

Currently, in Oxygen OS 14, users can choose to limit their device to 80% battery to try and slow down battery aging. In a future Oxygen OS release, possibly Oxygen OS 15, OnePlus devices will automatically limit themselves to 80% battery charging if they have been left plugged in for too long. There will be no user input needed for this.

Here are the strings highlighting how the feature may work upon release:

Code
<string name="regular_charge_protect_open_alert_content">Your device has been charging for too long. To avoid damage to the battery, \"Charging limit\" has been turned on.</string>
<string name="regular_charge_protection_content">To slow down battery aging, the battery level will always be kept at 80% while charging. This feature will automatically turn on when your device has been charging for too long.</string>
<string name="regular_charge_protection_notification_content">To slow down battery aging, the battery level will always be kept at 80% while charging.</string>

Note that the upcoming feature is not the same as the Optimized Charging feature currently available on OnePlus devices. While Optimized Charging also limits the battery level to 80%, it predicts user behavior and tops up the rest of the battery 100 minutes before the user is likely to unplug the device.

In contrast, Charging Limit will always keep the battery level at 80% while plugged in, making it more useful for those who permanently keep their phones connected to a charger. Users have a toggle for this feature right now, but in the future, the phone could also take this decision for itself.

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