Battery running time has much variable like resolution, framerate, which functions are enabled- WiFi, voice command etc.
If I record in 4K/60 battery holds up for 70-80 minutes, so your 1.5 hour seems not bad.
for Timelapse mode certain things can be set down and off and not needed you have the option for external power, also with the gopro battery, there are a few settings that require the blue battery, let us know what you find on that , as gopro really never said.
Hypersmooth 2.0 may require the battery especially in slow motion and possibally timewarp.
if scheduling a timelapse turning on/off, today its possible. may conserve battery that way, never know. also do different intervals.
I Just realized why I am getting VERY short battery life... When I power off the camera it goes off for a few seconds then TURNS ON Again! not knowing, thinking its off...I go to use it...DEAD
Anyone have this issue? Remedy?
GoPRo 8 black