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Battery on 1040

1480420
over 2 years ago

Hello I know it’s probably a bit early but just wanted to know your opinions.

got my 1040 yesterday and updated to the latest  Firmware.

Started with 100% and after connecting all my sensors I was at 99%. Then my ride was about 1:10h long and I lost another 5% down to 94%.

would bring me to around 20h of usage instead of 35h.

most of the time I used the Training page (I did Intervalls)

navigation was on 

brightness was set to auto

i forgot to enable display timeout but it was sunny so I think brightness was nearly all the time between 0-20%

i connected: Speed sensor, cadence, Chest strap, Varia light 

what’s interesting: today (one day later) I turned on my 1040 and battery was not at 94% but at 96%. Does it need some charging cycles ? 
btw yesterday after the ride the screen was also frozen and had to press the button a long time till the 1040 restarted

  • 0 over 2 years ago

    From my experience you are not going to get 35 hours unless the display has no backlight on at all.

  • 0 over 2 years ago

    Li-ion battery level has nowhere near the quantitative accuracy as liquid fuel in a tank.  It's always an estimate based on voltage, which is an indirect measure and varies due to temperature, battery age, and other factors, and possibly usage history if the level indicator is designed to do such. So, extrapolating from small changes in indicated level can lead to erroneous conclusions.   For example, you shut off your device at 94% and the next day it indicated 96%.  If it self charges 2% over night, leaving a fully depleted unit off for 50 days should fully recharge it.   

  • 0 over 2 years ago in reply to looigi

    Today I lost 2-3% on a 40 min ride. Would still mean 25%. No navigation today just data fields. Display timeout after 15 sec. screen brightness 0%

  • 0 over 2 years ago in reply to 1480420

    Well 2% would be 33 hours. You over thinking this.  Just enjoy it and remember it needs charging every so often rather than every 2-3 rides. Basically it lasts up to that time in best circumstances.  Think of electric cars that last up to 300+ miles - in summer at low speeds.  Put them at high speed in winter and the range is half that.  

    The backlight though is by far the greatest drain. 

  • 0 over 2 years ago

    Battery performance is temperature related, so don’t be surprised if it drops more rapidly at lower temperatures and recovers a bit when it warms up.

    Also (based on a 530), WiFi increases battery drain, particularly when searching for a network, so keeping it turned off when not really needed is worthwhile.

  • 0 over 2 years ago in reply to PeterK_55

    Once a activity is started, WiFi is automatically turned off and it will not search for a network.

  • 0 over 2 years ago in reply to cheracogoff

    Thanks for that info.