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03-31-2026 03:43 PM in
Galaxy S- Mark as New
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04-01-2026 08:40 PM in
Galaxy SThank you for sharing your concern regarding sudden battery drops on your Galaxy S21+ after the recent update. This issue may occur due to a software calibration mismatch after the update, which can temporarily affect battery percentage reporting.
Please try the following steps to stabilize battery performance:
- Restart the device:
A simple restart can help the system recalibrate battery usage. - Check for battery-draining apps:
Settings > Battery and device care > Battery > Usage since last full charge. Close or uninstall apps consuming excessive power. - Optimize device performance:
Settings > Battery and device care > Optimize now, to clear background processes. - Calibrate the battery:
Charge your phone to 100%, then use it normally until it fully discharges to 0% once or twice. This can help the system recalibrate battery reporting. - Ensure software is fully updated:
Settings > Software update > Download and install. Updates may include battery optimization patches.
If the issue continues after several days of normal usage and following the above steps, we recommend visiting the nearest authorized service center for a full battery inspection:
https://www.samsung.com/ae/support/service-center/
For further assistance, you may contact us via the support page:
https://www.samsung.com/ae/support/contact/
