Battery drained from 43% to 0% overnight!?

Do a battery calibration. Charge it to 100% and with flashlight drain it to 10% and then charge it again. If the problem persists do a hard reset.

Ok thanks I’ll try that if it occurs again, will a hard reset in theory factory reset the watch? Loose all my settings etc

unfortunately yes

brilliant that painstaking job of setting all the screens back up  hopefully it was just a blip and the soft reset has sorted it! 

happens to me one time with 6x pro and i fix it with the method i told you.

2509391 said:

hard reset in theory factory reset the watch

Depends on definitions.

Power cycle - turn watch then off. Nothing lost

Soft/Hard reset - long press top left until shutdown. Lose any unsynced data but nothing else. Try this before the more nuclear option of resetting to defaults.

Reset from Settings, System, - data loss depends on which option chosen - IMVHO this is being used too often.

Do you have anything connectIQ installed?

There are 3 Steps

you are calling step 2 a soft/hard-rest

why not

step 1 -- power cycle

step 2 - soft reset - long press top left

step 3 - hard rest - via menue -settings... CAUTION all settings are deleted

or do i understand anything in a wrong way?

Only thing I have is the Hydration widget but I’ve used it on all my Garmins with no issues.