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935/Galileo Battery Usage

I did a 12 hr race over the weekend fully charged and left the Galileo on even though the entirety of the loop was pretty open coverage-wise and it wasn't necessary...I turned off all notifications and light as well as wi-fi and bluetooth but left the WHR (i know it's inaccuracy but forgot to flip it off too) on and finished with only 11% battery life left....Should I expect that little of battery life with the Galileo and WHR on?...I've only had my watch for a little more than a year

0 mcalista over 5 years ago

Maximum battery economy is achieved with GPS only. Adding in either of the other satellite systems (GLONASS or Galileo) means the GPS chipset is powered on for longer, and will consumer more battery. I have seen suggestions of 40% extra power consumption.

0 Former Member over 5 years ago

In the open GPS only is as accurate as the other combinations, and in my city I get bad tracks with either combination anyway. So I just stick to GPS only. DCR always uses GPS+GLONASS, and T5R swears by GPS only for accuracy.

Isn't the 935's battery good for 14 hours of GPS recording? I'd say 11% after 12hrs seems to be spot on.

0 MattFremon over 5 years ago in reply to Former Member

The 935 is advertised at 24 hrs

0 Elbo over 5 years ago

SInce a couple of months the battery life of my 935 isn't what it used to be. It is tempting to blame the not so good 13.x firmware. But it could also be that after 2 years the battery capacity is reduced due to wear. Although my previous Suunto Ambit didn't show any battery aging after 3 years.

I do use gps/galileo since it is available on the 935. If I remember correct it didn't had any significant impact on battery life.

How old is your 935?

0 Dr Phil over 5 years ago in reply to MattFremon

To be pedantic - up to 24 hours in GPS mode and wrist heart rate. As soon as you start adding other sensors, phone connection, or augmenting the GPS with Galileo or GLONASS your battery life will take a hit - see P26 of the owners manual.