In this post, we explore whether the iPhone’s reported battery health is accurate by physically testing an iPhone 11 Pro battery that’s been used for over 3 years—and the results may surprise you.
📱 The Setup: iPhone 11 Pro After 3 Years
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Device: iPhone 11 Pro
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Usage: Daily for 3+ years
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Battery: Never replaced, never opened
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iOS Version: 16.0.2
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Battery Health (as shown by iOS):
100%
🤔 “No way. After three years, how can the battery still be 100%?”
Found this suspicious. Even after software updates, the phone insisted the battery health was perfect.
🧪 The Test: Real Battery Capacity Measurement
To get real numbers, Sorin:
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Disassembled the iPhone – The phone was carefully opened for the first time.
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Removed the genuine battery – Original Apple battery.
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Used a Battery Capacity Tester – A modified tool that:
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Discharges the battery fully
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Measures true capacity in mAh
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Shows detailed voltage, current, and capacity
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🧾 Test Procedure:
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Battery voltage before test:
4.2V(fully charged) -
Testing mode:
Capacity Test -
Test duration: ~1–2 hours
📊 The Results
| Parameter | Expected (New Battery) | Measured |
|---|---|---|
| Design Capacity | ~3,000 mAh | |
| Tested Capacity | 2,300 mAh | |
| Actual Health % | 100% (reported by iPhone) | ~75% (real) |
📉 iOS showed 100% health, but the tester measured only 2,300 mAh—meaning the actual health is closer to 75%.
🤯 What Does This Mean?
iPhone’s built-in battery health reporting can misrepresent real battery capacity.
Apple’s system may lock the percentage once a battery is replaced, or may not update it properly even with aging.
Physically testing with a proper battery tester is the only way to get accurate mAh values.
✅ Takeaways
Don’t blindly trust iPhone’s battery health reading.
If your device feels like it’s not lasting long despite showing “100%,” it might be lying.
Testing with a capacity tester gives true insight into battery condition.
A battery that dropped from 3000 to 2300 mAh should read ~75%, not 100%.
📺 Watch the Full Test
🙌 Thanks for Reading!
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See you in the next one! 👋
