530 firmware 5.10. Got in from last nights commute. Turned off wifi and autoupload. Saved ride and then pressed power button - let it sleep.
Got up the next day. Pressed power button and device dead. Long pressed power button and it beeped once but nothing on the screen.
Got into work and plugged it into USB charger. Long pressed power button again and it started up. Showed 35% battery left.
Not the first time its done this where reset only seemed to work when powered from USB.
checked the error log and it just shows Error Type 8 - which i believe is an abnormal power down and of no use to troubleshooting.
not using any Connect IQ apps - just a heart rate sensor and speed/cadence sensor.
I really want to like this device but it doesn't seem reliable.