Ok, my experience sofar. Lets put it this way, I experience no better battery life after using the new battery for a few weeks. I have been looking at bq27x00. But I dont realy get it. How do I switch to using bq27x00 instead of BME. And anything I should keep in mind when using bq27x00 instead of BME? When I have bq27x00 in place I will lookin to do a calibration.