i made 2 tests like following:
1) charged FR945 to 100%, enabled SpO2 measurment only for sleep, set my sleep time before to 11:00 pm to 04:45 am, my battery drain for 24h was ~10%
2) charged again FR945 to 100%, disabled SpO2 measurment completly, my battery drain for 24h was ~8%
i haven't played arround with the watch, only HR measurent for 24h, synced with Android GCM from time to time, thats all, think it's OK, or?
Former Member what do you think?