They charge fine in an external "dumb" charger, but will not recharge with the phone plugged in to either a wal charger, or a usb cable. Also, the display at the top has a question mark over the battery, and cannot report the amount properly in the notification bar. If you go to the system menu, however, it will report the amount there. The same battery works 100% in a 2.1 DX. I think I'll roll back, since we should get the OTA push very soon now.