How To Turn Off Battery Saver Mode On Apple Watch. Turn on your Apple Watch. When Low Power Mode is on your iPhone will last longer before you need to charge it but some features might.

As simple as activating the Power Reserve mode is turning it off again is even easier as it just requires the user to restart the device. Press and hold the side button until the sliders appear then drag the Power Off slider to the right. Here are the steps to do that.
You can also save your battery life by using accessories.
Tap All Watches at the top left followed by the Info button i next to the Watch you want to unpair. The watch then boots into normal mode. Here are the steps to do that. To disable Power Reserve mode and return your Apple Watch to normal mode you need to reboot the watch.

