the Battery is dead too fast?

seki3523 Registered Users Posts: 2
New Traveler
edited January 24 in TomTom Sports
I bought tomtom spark music in Apr 2018. I used that for only 3 months and my watch battery was dead too fast for several days back. yesterday I used my watch at treadmill. after only 20 mins, my watch was gone. at that time my battery remained more 70%. Yesterday I resetted my watch twice but same thing happens today. Help please.