Battery Save mode is a great feature - however i have noticed it appears to become disabled in a certain scenario as follows:
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Start ride navigating a route.
Battery Save mode is enabled & works as expected (goes to sleep after a screen press or turn alert).
Navigating a route, the Climbpro feature kicks in and starts telling me hill data...
When the hill completes, the screen reverts to the previous display screen but battery save mode never re-engages.
Disabling \ Re-enabling the battery mode option mid ride - does not work
Resolution = Stop activity \ power down \ power on \ resume ride - battery save mode carries on as normal.