to calibrate battery turn phone off and plug device into outlet press and hold power volume up and down at the same time until device poowers one or two minutes has passed if two minutes has passed call htc or asurion and replace it
round 2 with hardware failure maybe the heat from welding maybe to much flashing i dunno but htc and asurion aren't happy lol.
smartphones and ironwork dumb choices
you dont remember huh? time travel to before that dubby bro.