My initial experience regarding battery life after updating to firmware 5.40:
Fully charged to totally drained battery managed 90 hours.
During this time the GPS was ON for 4 hours and 20 minutes. The rest was more or less as usual.
So, slightly better than the 70 to 80 hours battery life I had with 5.20, but it will take time to be sure if there is a real improvement...
I dont find any notice in drop of battery life, albeit my device is new (less than a month old)... I sync every 2-3 days and i get a battery life of 7-8 days (no activity, just the usual walking and stair counts and sleep and HR).. with activity of 40 mins cycling i got a battery of 6 days (charged it exactly when 7th day was beginning)... have charged only once till now :P Will update if i find any issue... my response might be useless as my device is new... anyway wish to post and get in touch with all of you..
Cheers guys..
My 2 month old VA3 is now showing increased battery usage as well, I haven't changed usage and went from approx. 0.7% per hour to 1.2% per hour on average
firmware 5.40 the worst for battery life, even after factory reset, my watch still batt hunger. firmware 5.2 my watch can last 7 days but after auto update to 5.40 the battery only last 2 days, same setting and face watch