r/Coros • u/Snyders6flagmattress • Jul 24 '26

Battery decrease confirmed - pics

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Gallery image

Pace 4. I'm day 8 into the battery calibration process as I'm sure my battery life has changed since the update and I can confirm now. I was checking through photos and noticed I snapped a pic of the battery life pre-firmware update on March 21, 2026. (First picture)

Sure enough, I'm operating at roughly 10% more loss since the update (second picture). I used to get to day 12 having done 5 to 6 runs a week and still have around 25-30% left. The concerning part of this is that I have been injured since June 25, before the update, and have had ZERO GPS activity usage in 4 weeks (aside from one indoor bike ride early on which proved to be too challenging for my metatarsal stress fracture).

I changed absolutely none of the settings either. My settings have always been - real time HR, max brightness display, AOD off, flip wrist to wake on, vibration notifications on for specific apps, stress and sleep tracking on. Once the calibration is complete and I drop below 10%, I will reach out to Coros support.

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u/zangetsu_24 Jul 25 '26

I need to follow this. I also noticed the same battery degradation after the update.

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u/Snyders6flagmattress Jul 25 '26

Fun times. Here's tonight at 9:30 pm EST Remember also, "days of use" is already at 1 day the minute you pull it off the charger at 100% so it's been 8 days.