Works when it works, but frequently stops working. Phone will intermittently power off at around 70-80% charge, and requires pulling and reinstalling battery to restart. Manufacturer asked if I had performed calibration (I had) and has since been unresponsive. Repeated calibration, and it worked again. For a while. Phone displays no issues when running OEM battery. Appears to need be be run through calibration on an almost weekly basis; not convenient.