Garmin edge 840 battery drain
Hello, I am new to the whole bike computers thing and I recently got a new Garmin edge 840 because I saw reviews and posts that is a very good unit with great battery life, better than 850. But I think the battery life of my unit is less than advertised.
For example, today I did road cycling for 4,5 hours and it went from 100% to 80%. Is that normal? Isn’t it supposed to last about 30 hours?
I didn’t use navigation today, but I have hr chest strap connected and power meter pedals (favero) all with ant+. Also I carry my phone with me and I think it auto connects to the Bluetooth but I don’t know what impact this has on battery.
Also, I noticed that while I completely power it off after rides, I find it loses 1-2% after some days.
Is this behavior normal or I should return it? Thanks
(Running the latest software update)