Samsung Battery Health Checker

🔋 Samsung Battery Health

📁 Tap to select or drag & drop your
dumpState file here

📊 Battery Health Metrics

BSOH (State of Health)Most Accurate

mSavedBatteryBsoh - Overall battery condition

ASOC (State of Charge)

mSavedBatteryAsoc - May fluctuate after OneUI 6.1.1

Calculated HealthVerified

From charge counter ÷ battery level

🔄 Cycle Information

Estimated Charge Cycles

First 3 digits of mSavedBatteryUsages

Raw Plug-in Count

mSavedBatteryUsages - Times device was plugged in

🔬 Verify with Charge Counter

Manual Calculation (Most Reliable Method)

For best accuracy, charge your phone to 100% before generating the dump file. The charge counter's first 4 digits represent current mAh capacity.

Charge Counter:

Battery Level (%):

Phone Model:

Current Capacity: -

Calculated Health: -

🆕 Is This a New Battery?

Health ≥ 95% -

Cycles < 50 -

Verdict: -

How to interpret:
• BSOH - Battery State of Health, introduced in OneUI 6.1.1, most reliable indicator
• ASOC - Absolute State of Charge, shows % of original capacity remaining (may fluctuate)
• Charge Counter - Raw mAh measurement, use for manual verification
• A new battery should have ≥95% health and <50 cycles

Debug: Search file contents

How to get the dump file

Dial *#9900# on your Samsung phone
(Turn off Auto Blocker if it doesn't work)
Tap "Run dumpstate/logcat" and wait 2-3 minutes
Tap "Copy to sdcard (include CP Ramdump)"
Find the file in Internal Storage → log → dumpState_[YourModel]
Upload that file here!

💡 Tip: For most accurate charge counter calculation, charge your phone to 100% before generating the dump.

OneUI 7 / S25 Users: You can check battery health directly in Settings → About Phone → Battery Information.

Common Battery Capacities

Model	Capacity
S25 Ultra / S24 Ultra / S23 Ultra	5000 mAh
S25+ / S24+	4900 mAh
S23+	4700 mAh
S25 / S24	4000 mAh
S23	3900 mAh
S22 Ultra	5000 mAh
S22+ / S21 Ultra	4500 mAh
A55 / A54 / A53	5000 mAh
Z Fold 5 / Fold 4	4400 mAh
Z Flip 5 / Flip 4	3700 mAh

📚 References & Sources

Official Documentation

Android Developers: dumpsys tool - Official Android documentation for the dumpsys command used to extract battery diagnostics via ADB.
Samsung Knox: Battery Health - Samsung's enterprise documentation explaining Battery State of Health (SOH) categories: Good, Normal, Weak, and Bad.
Android Developers: Monitor Battery Level - Official guide on monitoring battery state and charge levels programmatically.

Community Research & Guides

r/GalaxyS9: Checking battery health accurately using ADB dumpsys - Original community guide (2021) documenting the charge counter calculation method and mSavedBatteryAsoc.
r/oneui: Checking battery health and capacity accurately [Full Guide] - Updated guide (2025) covering BSOH vs ASOC differences and Shizuku/LADB methods.
r/GalaxyS23: Extensive Guide - Check Your Battery Health and Cycle Count - Comprehensive guide for SysDump method with community verification.
r/oneui: Sharing methods to check battery health - Discussion on OneUI 6.1.1 changes affecting ASOC accuracy and introduction of BSOH.

Technical Resources

Technastic: How to Check Battery Health via ADB - Technical guide explaining that mSavedBatteryUsages represents plug-in count, not full charge cycles.
XDA Forums: Reliably check battery health for Samsung - Developer discussion on battery health reliability across different Samsung devices.

Key Findings Summary

mSavedBatteryAsoc - Represents battery's remaining maximum capacity as percentage. May fluctuate after OneUI 6.1.1 update.
mSavedBatteryBsoh - Battery State of Health, introduced in OneUI 6.1.1, more reliable than ASOC.
Charge Counter - First 4 digits represent current mAh at current battery level. Formula: (First 4 digits ÷ Battery %) = Current Capacity.
mSavedBatteryUsages - Number of times device was plugged in (not full cycles). First 3 digits approximate charge cycles.
Status field - Must not equal 1; if Status=1, battery info cannot be read correctly.

Disclaimer: This tool is for informational purposes only. Battery metrics may vary by device model, firmware version, and OneUI version. For official battery diagnostics, use Samsung Members app or visit an authorized Samsung service center.