2.) The new batter has a lower mAh rating, thus lower capacity. The original battery should have been a 2100 mAh capacity, compare that to the replacement.
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3.) Clear the cache partition first and observe the phone for at least 24 hours.
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* Turn off the device.
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* Press and hold the following three buttons at the same time: '''Volume Up key, Home key,''' and '''Power''' key.
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* When the phone vibrates, release the '''Power''' key but continue to press and hold the '''Volume Up''' key and the '''Home''' key.
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* When the Android System Recovery screen appears, release the '''Volume Up''' and '''Home''' keys.
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* Press the '''Volume Down''' key to highlight '''wipe cache partition'''.
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* Press the '''Power''' key to select.
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* When the wipe cache partition is complete, '''Reboot system now''' is highlighted.
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* Press the '''Power''' key to restart the device.
There are 2 possible reasons for this:
1.) The new battery is defective
2.) The new batter has a lower mAh rating, thus lower capacity. The original battery should have been a 2100 mAh capacity, compare that to the replacement.