Spark 3 Cardio extend battery life

estebancr Registered Users Posts: 2
New Traveler
edited January 24 in TomTom Sports
Hello I did test my Tomtom Spark 3 Cardio made running and bicycling, but on both activities I only get close to 6 hours of battery. I used GPS+ integrated HR. Aditional the tracker mode is ON, measuring diary calories and sleep. Phone sync is OFF.
I´m endurance runner ( bike and run ) and a lot of my routes for training is about 8 hours.

Is posiible increase the battery life, for example if I use an Heart Rate band and not the integrated HR. ?

Also I want to use a cadence sensor, it will drain more the battery ?

thanks :grin:

PD> 1.7.62 firmware


  • tfarabaugh
    tfarabaugh Posts: 16,935
    The more sensors are on the less battery life you will get. An external strap will use less power than the integrated HR as it is no longer running the LEDs. The tracker does not have much impact. Battery life is rated for around 5 hours for GPS/HR/Music, 9 for GPS/HR, 11 for GPS only, 2 weeks for watch only (that includes pause time as the sensors are still on - so if during a 2 hour activity you had 30 minutes of pause it was 2:30 of battery life, not just the 2 hours it was recording for). Those of course are estimates and best case scenario and are impacted by usage (using backlight, switching screens, etc.) and environmental conditions (overcast skies, tree cover, tall buildings, etc.). If you have night mode or the backlight on that is going to impact it greatly. I have found that they are pretty accurate estimates and my usage and testing has pretty well matched them. Bear in mind that the battery gauge is a rough estimate at best and I have gone many hours when it indicates that it was almost empty. I have gone 8 hours on mine with no problems as long as I have Music and phone sync off with no backlight and do not constantly change screens (which draws power to refresh it every time).

    I hope this helped answer your question. If so, please mark it as a solution so others can look for it if they have the same question.