After installing 27.09 on forerunner 965 the battery is draining at very fast rate

9765189 1 month ago

The draining is 4x times higher without any activities requiring GPS nor any otehr changes to the setup of the watch. Today it lost 10% in 6 hours ... doing nothing

Top Replies

Jacquers 21 days ago in reply to Elad +1

Double check that the activity and satellite settings are still the same after the update.
flocsy🤠 21 days ago in reply to Elad +1

WOW! I wish mine was like that! Mine was worse since day 1 (2.5 years ago). I never reached 6 days. You also have some 4 big activities there. It's not bad at all! What was your battery usage like before…

All Replies

0 Elad 21 days ago in reply to flocsy🤠

It was holding way better, have done full ironman and lost maybe 30% , using the default watch face never change it, i am not bothered at all with it. I already replaced one watch which had other issues with cadence lock. I guess i am overthinking it

0 9765189 16 days ago

to summarize my case, 1 month after the (in)famous 27.09:

before 27.09 resilience 14-15 days

after 27.09 resilience 7.92-9.24 days

Before and after usage is absolutely the same so there is no other explanation but the firmware update for this catastrophic reduction

0 9059605 16 days ago in reply to 7292561

yes, same problem on 965

0 AEVDV 16 days ago

I may know what is happening. If I restart (Cycle off and on) the watch after an activity I do not loose power faster anymore. I think something is not being turned off after you stop an activity. For me I think it may be my heart rate brodcast.

0 chocorello 16 days ago in reply to AEVDV

I agree 100/100. Not by menu but by pressing the top left button.

I noticed the problem after doing for the first time non-gps activities. Treadmill and elliptical due toman injury, so I cannot test run activity.

0 DaveFromLeeds 16 days ago in reply to AEVDV

I think you'll find that fix is only temporary. I have done the same. After a few hours the drain begins again.

0 chocorello 16 days ago in reply to DaveFromLeeds

Not for.me.Dave. it's been properly working for 6 days now and I am on 42% battery. I installed battery graph from iq connect and I monitor the behaviour. Cheers.

0 flocsy🤠 16 days ago in reply to AEVDV

Do you use any CIQ datafields in that activity? Or is it a CIQ app that you used to record the activity? I am a CIQ developer and a few of us are trying to find a similar battery drain issue with some of our apps

0 AEVDV 10 days ago in reply to AEVDV

Okay doing inside non GPS activities each burned at 1% per hour. If I turned the watch off and on after the activity it used about 7% per day. Today I did not reset the watch and it continued to use 1% per hour of the battery after my activity. Garmin has definately left something on after the activty ends. My activities use BT for heart rate broadcast and does not use GPS. It also gets trainer telemtry from my tacx bike.

0 flocsy🤠 10 days ago in reply to AEVDV

I have 2.72/h since last charge (this includes 1.5 hour of GPS running with the Multi band GNSS setting and some walking with the simple GPS)