Originally Posted by BenjaminM
I hope this will be solved one day, this is really restrictive as it stands...
I've discovered that the latest FW update (Onate_Truesmart_20140513.103530_v2.0) has introduce a new "Smart Mode" --> "Sport Mode", which basically turn off the back-light but keep the screen on hence, the sensors (Accelerometer, GPS, etc.) are kept alive.
I've been trying it for couple of days and it works great. It terms of battery drain, it is noticeable but remains reasonable. Anyway, if you are note recording any fitness activity, you can still change the mode after your workout.