How to reset battery on Samsung S25 Ultra?

To "reset" the battery on a Samsung S25 Ultra, you perform a Battery Stats Reset via a hidden dialer code (*#9900#) to clear usage data, and/or wipe the cache partition from recovery mode, and often perform a battery calibration (full drain/charge cycle), all aimed at recalibrating the battery meter and improving efficiency.
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How do I reset my s25 battery stats?

you need to turn Auto Blocker off for the reset, in the samsuing phone app type *#9900# and scroll down to Battery stats Reset. Tap on that and restart your phone, you may wish to turn on Auto Blocker afterwards.
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How do I reset my Samsung battery?

To perform a Samsung battery reset (often called resetting battery stats) to improve battery tracking, open the phone dialer and type \*#9900#, then find and tap "Batterystats reset," followed by restarting your phone; this clears usage data, allowing the system to recalibrate how it manages power for a fresh start, though it can take a few days to fully optimize. 
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How to calibrate s25 ultra battery?

Calibrate Your Battery

Let your phone drain completely, then charge it uninterrupted to 100%. This may help recalibrate the battery meter.
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How to reset battery life to 100%?

How to Calibrate Your Battery
  1. Charge your device's battery to capacity.
  2. Use the device until it shuts off due to low battery.
  3. Let the device sit for at least 5 hours (preferably overnight).
  4. Charge the device again without interruption until it reaches 100%.
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Galaxy S25 Ultra/S25+: Battery Draining Too Fast on Samsung? - How to Fix!

Why is my S25 Ultra battery draining fast?

Your S25 Ultra battery is draining fast due to background apps, high brightness, outdated software, heavy usage (gaming/streaming), poor 5G signal, or features like Always-On Display (AOD) – fix it by optimizing settings (Dark Mode, adaptive refresh, power saving), restricting apps, clearing cache, or checking for updates and software bugs. 
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What is the *#9900 code for battery?

What is the *#9900 code for the battery? *#9900# opens the System Dump menu on certain phones, which helps you check logs that may include battery stats.
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How to make S25 ultra battery last longer?

To save battery on your Samsung S25 Ultra, use Power Saving Mode, enable Dark Mode, lower screen brightness/resolution, set a shorter screen timeout, and reduce the refresh rate to 60Hz; also, manage background apps by putting unused ones to sleep or deep sleeping them, and use Wi-Fi over mobile data.
 
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How do I reset my battery?

To "reset" your battery (more accurately, recalibrate its reported level), you usually perform a full charge/discharge cycle: drain your device until it shuts off, then charge it uninterrupted to 100%, repeating if needed to help the system read battery health more accurately. For cars, it's disconnecting terminals briefly; for phones, use the cycle or dialer codes; for laptops, also the full cycle. 
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What is the secret code for battery reset on Samsung phone?

To "reset" your Samsung battery, use the dialer code \*#9900#, find and tap "Batterystats reset," then restart the phone to recalibrate battery usage tracking; this clears old data and lets the phone relearn your usage, though it can take time to optimize. Some users also suggest draining the battery to 0% and charging to 100% afterward for a full cycle, while another code, *#0228#, can check battery voltage.
 
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What is *#0228 used for?

How to check the battery status of your Samsung smartphone. Let's start with Samsung, as the Galaxy smartphones are the most widely used smartphones. To check the battery level of your Samsung phone, you have two options so far: the secret code *#0228# or the diagnostic function.
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What does the battery reset button do?

A battery reset, or calibration, tells a device's software its true charging limits, fixing inaccurate battery percentage displays (like on phones or laptops) and helping modern cars' computers adjust to a new battery for efficient charging. It doesn't increase battery life but restores accurate readings by clearing old data and relearning charge levels, resolving glitches or performance issues in electronics and preventing overcharging in vehicles.
 
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How do I reset my Samsung battery stats *# 9900?

Open the dialer and type *#9900#. Scroll down and tap on the Batterystats reset option to erase current battery usage data and restart the learning process. *Do this beforehand: Go to settings > Security and privacy, and then turn off Auto Blocker.
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How do I reset my Samsung phone battery?

To perform a Samsung battery reset (often called resetting battery stats) to improve battery tracking, open the phone dialer and type \*#9900#, then find and tap "Batterystats reset," followed by restarting your phone; this clears usage data, allowing the system to recalibrate how it manages power for a fresh start, though it can take a few days to fully optimize. 
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What is *# 0 *# in Samsung?

*#0*# on a Samsung phone opens a hidden Hardware Diagnostic Menu, a secret service screen to test all phone components like the display (colors, touch), speakers, sensors (gyro, proximity, grip), camera, and more, helping you check if hardware works properly before buying used or finding issues, all by typing the code in the phone's dialer and letting it load automatically.
 
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How can I make my battery 100% healthy again?

Recalibrating the battery on Android is very simple, just follow these steps:
  1. Charge the device to 100% and leave it charging for another one or two hours, without using it.
  2. Disconnect the charger and use the smartphone normally, until it reaches 0% and turns off.
  3. Charge it again to 100%
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How long should the S25 Ultra battery last?

The Samsung S25 Ultra's 5000mAh battery generally provides excellent all-day use, often yielding 8 to 10+ hours of Screen-On Time (SoT) with mixed heavy use, and some users even see multi-day usage; it excels at video playback (up to 31 hrs claimed) and improved optimization with One UI 7 helps it last longer than the S24 Ultra, but heavy gaming or high settings (QHD+, 120Hz) can reduce this to a single day. 
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Does dark mode save battery on S25 Ultra?

Lower the screen brightness or enable adaptive brightness to reduce power usage from the display. Switch to dark mode, which can help save battery on the AMOLED screen by reducing pixel activation. Reduce the refresh rate to 60Hz in settings if you're not watching videos or gaming to cut down energy use.
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What does *#7353 do on Android?

This unique identifier is crucial if your phone is lost or stolen, allowing authorities to track it down. *#7353#: This code opens the Quick test menu. This allows for a quick way to test certain aspects of your Android.
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How do I reset battery stats on S25?

My device is an S25 Ultra. Dial *#9900# then scroll down to battery stats reset. Click then restart your phone. Wait 14 days for battery optimisation to complete.
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What does *#2663 do?

*#2663# Dial this code and, in the window that opens, click on 'Refresh WiFi Version. ' This will slightly improve your phone's WiFi performance!
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How to clear battery cache on Samsung?

To clear the system cache on your Samsung for better battery, power off your phone, connect it to a computer via USB-C, then hold Volume Up + Power until the Android logo, release, and navigate the Recovery Menu with volume buttons to select "Wipe cache partition" (confirm with Power), then select "Reboot system now" to restart. This process clears temporary system files without deleting personal data, often improving battery drain. 
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