@pali, I just finished the testing as you mentioned

1. If keeping using bq27x00, the phone never reboot self
2. When I change from using bq27x00 to BME, rmmod and start bme, the phone will reboot within 5 mins
3. If I only rmmod WITHOUT start BME, the phone still reboot within 5 mins
4. Last thing, If I rmmod and start BME, then I reboot myself, after the phone is finished booted up, fault message still pop up (An unexpected reboot has occurred, kernel cant be load)