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Edge 840 Batery life not good

How is the real batery life of the new 840? I just got it and did a full recharge 2 days ago. Did my first ride with the 840 yesterday with a total time of 4h24 with 2 stops. And had only 45% left over? Wifi is off. All the rest is on dual band gps, phone connection, HR and Sram AXS and 100% brightness.

Is this normal?

They claim on the website 26h in intense mode. Who ever know what they mean by that? "intense mode"

0 alanyu over 1 year ago

*100% brightness*, as expected.

0 looigi over 1 year ago

Yep. 100% brightness kills batteries, and very likely isn't needed. Intense use means lots of senors and using multiple satellite systems. Here's a description of battery life vs various usage scenarios. Note backlight is set to auto, or less.

support.garmin.com/.../

0 Joeribar over 1 year ago in reply to alanyu

So intense mode means all off and no sensors connected ok very strange way to say but anyway. I gonna try auto brightness

0 Joeribar over 1 year ago in reply to looigi

0 looigi over 1 year ago in reply to Joeribar

I believe "intense" refers to the level of usage, not backlight brightness, so equivalent to "Demanding" in the chart.

0 robsnow31 over 1 year ago

I can tell you 100% it that it is your brightness. I have mine set to "always on" because i manually set it to 0% for day and brighter for early morning when it's dark. On two occasions between my 830 and 840 I have missed the switch and set it to "auto" for day and on and my battery life was as you experienced for ~4hr rides. When I do it right, I'm @ 75-85%.

0 George over 1 year ago

You may have a duff unit. I get easily 20 hours with everything on (auto GPS mode, auto backlight, heart rate, power meter and groupset connected, navigation on, bluetooth phone, livetrack, wifi).

0 looigi over 1 year ago in reply to George

What do you get with 100% brightness (not auto) like the OP was running?

0 Niterider4 over 1 year ago

It's definitely the 100% brightness. You can see it if you set it to auto, then swipe down from the top. That will show you the hours you have remaining. When I switch my brightness from Auto to 100%, my expected battery life with a full charge goes from 20+ hours down to 8 hours, which is exactly what you are reporting.