Updated my fenix 5s recently and it keeps completely dying on me.

Former Member
Former Member

Updated on Wednesday, used it for a cardio session which it worked for, then it just completely died on me. 
Put it on charge and left it, came back to it later that night and managed to turn it on and it had +80% battery. 
Wore it that night and in the morning until it completely died again around 9am. 
Put it on charge at home to see if it might resolve itself, left it overnight, managed to turn it on in the morning and it had 61% wire it for about an hr and it has just died again. 
Is there a way I can revert back to the old software or something?