Have a 9930 as well as a Storm, when using a non-RIM car adapter, get message that the battery will not be charged. Works fine with a RIM car charger. At first I thought it was the wattage being supplied was too low, just tried a car adapter, USB to Micro, 1.0A and 2.1A, get same message on both USB jacks. Any reason Blackberry not compatible with after-market adapters? Any fix?