Hi. Is it good to keep my Apple Watch on charge all the night?

Hi

Apple advises that you can charge Apple Watch whenever you want:

Batteries - Why Lithium-ion? - Apple

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 battery on Apple 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.

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

Alain8 wrote:

Is it the same for iPhone ?

The same principles apply for iPhone.

Be sure to follow Apple's instructions, including those here:

• http://help.apple.com/iphone/10/#/iph63eecc618
• http://help.apple.com/iphone/10/#/iph301fc905
• Keeping iPhone, iPad, and iPod touch within acceptable operating temperatures - Apple Support

There's no problem in doing this - modern chargers won't over-charge a battery, they just turn off once a full charge is reached and top it up as necessary.

You're welcome! 🙂