Hi Jakub,
So, if you consumed 15%, Bolt 3 is displaying 85% remaining after 2h? On that basis I don’t expect running warm in cold ambient temps. That consumption is similar to my experience with Roam 3.
I’ve never fully discharged my Roam 3 and my longest ride time was about 8h.
Assuming displayed discharge % is linear (probably not), then 7.5%/h extrapolates to 0% at 13.3 hours. However, the displayed % is unlikely to be a linear match to battery discharge characteristic and shutdown probably occurs around 5 to 10%. Accurate tracking discharge of Li and other batteries very difficult
I guess you need to Start a ride, in a room in daylight or with light on (keep Bolt backlight on) and see how long it lasts, check and record %?
Personal view - I think quoted runtime is with default setting basic Auto backlight, Auto Max probably reduces runtime (but I’ve not felt the need to verify).