How to Fix Samsung Battery Drain After a One UI Update (2026 Guide)

It’s common for Samsung Galaxy users to experience battery drain after a major One UI update.

Whether you’re using a Galaxy S23, Galaxy S24, Galaxy Fold,Galaxy Flip, or even A-series device, you may notice:

• Faster battery drop overnight
• Increased overheating
• Background apps using excessive power
• Screen-on time significantly reduced

The good news? In most cases, this is temporary — and fixable.

Here’s exactly what to do.

Why Battery Drain Happens After One UI Updates

After any major One UI update:

• System apps re-optimize
• Background indexing runs
• Adaptive Battery resets
• AI features may activate by default
• App compatibility issues can appear

For the first 24–72 hours, higher battery usage is normal.

If it continues beyond that, apply the fixes below.

1. Restart Your Phone (First Mandatory Step)

After an update, some background services remain active.

Restarting clears temporary system processes and stabilizes performance.

Hold Power + Volume Down → Restart.

Simple, but often effective.

2. Check What’s Draining Your Battery

Go to:

Settings → Battery → Usage Since Last Full Charge

Look for:

• Social media apps consuming unusual percentages
• Google Play Services spikes
• Samsung AI services
• System UI unusually high

Identifying the culprit is key.

3. Put Apps Into Deep Sleep

Go to:

Settings → Battery → Background Usage Limits

Enable:

• Put unused apps to sleep
• Deep sleeping apps

Manually add apps you don’t use daily.

This can reduce idle drain significantly.

4. Disable RAM Plus (If Enabled)

RAM Plus uses internal storage as virtual RAM.

On some Galaxy devices, this increases background activity and battery usage.

To disable:

Settings → Device Care → Memory → RAM Plus
Turn it off
Restart the device

Many users report improved battery life after disabling it.

5. Turn Off Unused Galaxy AI Features

Recent One UI versions activate AI tools automatically.

Go to:

Settings → Advanced Features → Galaxy AI

Disable features you don’t actively use, such as:

• Smart suggestions
• AI call assistance
• Live translation
• Context awareness tools

These constantly analyze behavior in the background.

6. Clear Cache Partition (Advanced Fix)

This is one of the most effective post-update solutions.

Steps:

1. Power off the phone
2. Hold Volume Up + Power
3. Release when Samsung logo appears
4. Select “Wipe Cache Partition”
5. Confirm
6. Reboot

This does NOT erase personal data.

It clears leftover system files from previous firmware versions.

7. Update All Apps

Outdated apps can conflict with the new One UI version.

Go to:

Google Play Store → Update All Apps

Also check Galaxy Store for Samsung app updates.

8. Reduce Refresh Rate (Optional Test)

Go to:

Settings → Display → Motion Smoothness

Switch to Standard (60Hz) temporarily.

If battery improves dramatically, use Adaptive instead of High.

9. Give It 3–5 Days

Battery learning behavior resets after updates.

Usually within 3–5 days, usage stabilizes automatically.

If battery drain continues beyond a week, consider factory reset as last resort.

Final Thoughts

Battery drain after a Samsung One UI update is common — but rarely permanent.

In most cases, disabling RAM Plus, limiting background apps, and clearing cache partition solves the issue.

Before panicking, give your device a few days to optimize itself.