Should I charge my Apple Watch battery all the way to 100 and run down to 10 and recharge? Like what is the proper way to charge to preserve the battery life?

Hi

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:

https://www.apple.com/batteries/why-lithium-ion/

Apple's tips for maximising battery life and battery lifespan on Apple Watch are detailed here:

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

You may find it most convenient to charge your watch nightly, overnight. The watch cannot be overcharged and 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. Follow Apple's safety and handling instructions 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 Nightstand Mode useful:

Use Nightstand mode on your Apple Watch - Apple Support

More information:

Check your battery and charge your Apple Watch - Apple Support

Keep Apple Watch within acceptable operating temperatures - Apple Support

The amount of documents and data content on your iPhone does not affect the battery life on Apple Watch.

Battery life varies depending on use and other factors.

In tests, for example, Apple achieved 18 hours of battery life with the following usage: 90 time checks, 90 notifications, 45 minutes of app use and a 30-minute workout with music playback from Apple Watch via Bluetooth. Other examples are detailed here:

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

As referenced in my earlier reply, Apple's tips for maximising battery life on Apple Watch are detailed here:

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

As your watch is experiencing significantly shorter battery life than Apple's examples suggest that you should expect, it may help to try the following steps:

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

Close all open apps on your iPhone and then restart both your iPhone and your watch:

• On your iPhone: double-click the Home button, then swipe up on each app preview to close it;
• Turn both devices off together, then restart your iPhone first;
  • Restart your iPhone, iPad, or iPod touch - Apple Support
  • Restart your Apple Watch - Apple Support

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, choose to Restore from Backup. Most data and settings will be restored, with some exceptions (eg Apple Pay cards, passcode).
• Unpair your Apple Watch and iPhone - Apple Support
• Set up your Apple Watch - Apple Support

Under previous software versions, some users reported experiencing 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

Just keep the watch on the charger while you are sleeping. The watch cannot be damaged by charging too long. It will automatically stop charging when it is fully charged.

See this about the battery: http://www.apple.com/watch/battery.html

You're most welcome! 🙂

No, it doesn't.