Battery Calibration

All newly-installed battery should be calibrated as soon as possible. This helps your phone, tablet, laptop or other device get an accurate reading on the battery's state of charge.

How to calibrate your new battery.

For phones and tablets:

1. Charge it to 100%, and keep charging it for at least two more hours.
2. Use your device until it shuts off due to low battery.
3. Charge it uninterrupted to 100%.

For laptops:

1. Charge it to 100%, and keep charging it for at least two more hours.
2. Unplug your laptop and use it normally to drain the battery.
3. Save your work when you see the low battery warning.
4. Keep your laptop on until it goes to sleep due to low battery.
5. Wait at least five hours, then charge your laptop uninterrupted to 100%.

It's best to perform this process periodically (about once a month) to ensure that the battery remains properly calibrated throughout its lifespan.

For more detailed information, read this iFixit Wiki.

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