I overcharged my apple watch once. Now, it's draining battery faster than ever.

Hi

The battery on Apple watch cannot be overcharged. Apple's tips for maximising battery life and battery lifespan on Apple Watch are detailed here:

https://www.apple.com/batteries/maximizing-performance/#watchtips

Apple advises that you can charge Apple Watch whenever you want. There is no need to let the battery discharge to any particular level first, nor any benefit to be gained from doing so:

Batteries - Why Lithium-ion? - Apple

You may find it most convenient to charge your watch nightly, overnight. The battery will not suffer any harm from regular charging. Charging will stop automatically when the battery is fully charged and start again if and when required due to ongoing battery usage.

Be sure to follow Apple's safety and handling instructions (see the links below) and also note that:

• It is not possible to turn the watch off whilst it is on the charger and connected to power - this is normal.
• It is also normal for your watch, power adapter and charging cable to become warm when connected to power.

You may also find (the optional) Nightstand Mode useful:

Use Nightstand mode on your Apple Watch - Apple Support

More information:

https://www.apple.com/watch/battery.html

Check your battery and charge your Apple Watch - Apple Support

Keep Apple Watch within acceptable operating temperatures - Apple Support

https://help.apple.com/watch/#/apdcf2ff54e9

In respect of your battery life issue, note that battery life varies depending on use and other factors. Examples are detailed here:

http://www.apple.com/watch/battery.html

If your Apple Watch is experiencing significantly shorter battery life than Apple's examples suggest that you should expect, then the following steps may help, having previously resolved battery life issues for some users:

If you have not yet done so, update your iPhone and Apple Watch to the latest software, starting with your iPhone:

• Update the iOS software on your iPhone, iPad, or iPod touch - Apple Support
• Update the software on your Apple Watch - Apple Support

Restart both your iPhone and your Apple Watch, turning both off together and then restarting your iPhone first:

• Restart your iPhone, iPad, or iPod touch - Apple Support
• Restart your Apple Watch - Apple Support

If you have previously used the Workout app and/or any third-party fitness tracking apps to record workouts on your watch, check on your watch to see whether there is a paused activity within any of them. If there is, end that activity from within the app on your watch (not your iPhone).

• If in doubt, remove any third-party fitness app from your watch.

Unpair and re-pair your watch:

• The Watch app on your iPhone takes a backup of your watch automatically when unpairing via the app.
  • When setting it up again, initially choose to Restore from Backup. Most data and settings will be restored, with some exceptions (eg Apple Pay cards, passcode).
  • If the issue persists, consider instead unpairing and setting it up as a new watch.
• Unpair your Apple Watch and iPhone - Apple Support
• Set up your Apple Watch - Apple Support

Some users have previously experienced battery life issues in connection with using corporate profiles and/or Exchange Calendars. If you are using an Exchange Calendar, one or more of these steps may help:

• Archive your Exchange Calendar for all items before today.
• Remove / delete all old inbox messages relating to calendar invites (accept and decline notifications).
• Create a rule in your Outlook Mail account that moves all future accept and decline replies, immediately upon receipt, into a separate mail folder that does not sync with your iPhone and Apple Watch.
• Check your Exchange Calendar for errors.

Finally, it may help to:

• Remove third-party apps from the Dock and/or from your watch and then monitor battery performance after adding them back, one at a time.
  • https://help.apple.com/watch/#/apda1bf1a95b
• Remove watch face complications and monitor battery performance as you add them back:
  • Change the watch face on your Apple Watch - Apple Support

Having tried the previous steps, if your watch experiences significantly shorter battery life than Apple's examples suggest that you should expect, I suggest contacting Apple Support, making a Genius Bar reservation or visiting an Apple Authorised Service Provider for assistance, including - if recommended - to have your watch inspected and serviced:

Apple Watch Service Answer Center - Apple Support

You cannot overcharge an Apple device battery. That is a fallacy. You either misunderstood, or the person who told you that was misinformed.

Best of luck,

GB