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745 battery draining fast after activity

My Garmin 745 lost 66% battery in an evening after I went on a 30 min run.

I charged my 1 week old 745 to 100% around 6 pm yesterday before going out on a run. I ran 3 miles on a track near my house (with no music) and got back home within an hour. Did some work and hit the bed late around 1 am. That's when I noticed that the watch battery was at 33%. A drop of 66% in 7 hours!!! I restarted the watch and went to bed. Since restarting, the watch has dropped only 9% in over 12 hours.

What might have happened here? Could it be that GPS was running in the background? How can I tell if GPS is running?

Top Replies

Garmin-Brooks over 3 years ago +1 suggested

Hi everyone, I'm attaching a link to the page that shows how we calculated the specs for battery life. https://support.garmin.com/en-US/?faq=RMO7ny2RRm5w1Zth3P4ttA. That said, if anyone is experiencing…
Thibaud J over 3 years ago in reply to 9144903 +1

From my experience, i turned off the Pulse Ox, and move to a low consumption watch face (ActiFace, power saver On).

All Replies

0 Thibaud J over 3 years ago

I also feel that my new F745 drains faster than my 645, with same activities and settings.

0 Pavel over 3 years ago

Do you use Spotify? I found that it is draining a lot of battery.

0 Thibaud J over 3 years ago in reply to Pavel

Not at all, I did not even set it up.

Should/could we even remove it from the watch ?!?

Thanks for the suggestion.

0 Pavel over 3 years ago in reply to Thibaud J

I think it is a good idea to remove when you don't use it. When I had it installed (but I set it up) I have seen battery drain around 2% per hour, which is terrible but now it is lower.

0 Thibaud J over 3 years ago in reply to Pavel

I removed, and I also switch the watch face to Actiface, which has a very effective energy saver option.
Thanks.

+1 1419459 over 3 years ago

"the watch has dropped only 9% in over 12 hours." with smart phone connected or without?

0 Andy275 over 3 years ago

Check that your backlight is set to "wrist turn off" and timeout is set to a low number. I have mine off for keypresses and alerts too as the light drains a lot. I manually press it as needed. I also keep bluetooth off unless I am syncing, but that seemingly isn't as much of a drain.

+1 Garmin-Brooks over 3 years ago

Hi everyone, I'm attaching a link to the page that shows how we calculated the specs for battery life. https://support.garmin.com/en-US/?faq=RMO7ny2RRm5w1Zth3P4ttA. That said, if anyone is experiencing excess battery drain on software version 3.40 let me know and I would be happy to try and help.

0 Wilco 745 user over 3 years ago in reply to Garmin-Brooks

My Garmin 745 is on 3.40 and is suddenly draining, last 20 minutes - 8%. Was at 80% now at 70%. Noticed the message not enough juice . Settings are not changed today.

Please solve.

0 SURFERDELUXE over 3 years ago

Notifications per Day	30
Number of Interactions per Day	less 100
Device-Generated Alerts per Day (Move or Goal Alerts)	0
Hours per Day Outside of Bluetooth Range of Phone	1
Display Brightness & Timeout	Default Settings
Watch Face ¹	Default
Number of Gestures per Day	Disabled by Default
Pulse Ox Mode	active in the night
Number Minutes of Music Streaming	0
Number of Timed Activities	0

Battery drained 12% in 12hours, over the night. From 09.30pm until 06:30am DND is active.

Sorry Garmin, but I think that the battery capacity is to low.