Battery drain with the last two updates. Incl. 5.00

Since the last 2 updates of the 830, I lose almost 25% of the battery in a 2-hour drive. Are there more people who suffer from this? I have not installed anything else and i am also connected to the telephone all the way through bleutooth.
I think I'm going to do a restore to factory settings, see if that helps.

Cadans sensor, hartrate and a speedsensor. Batteries are new.