I have the charger that came with my Stratosphere (the one that the usb cable plugs into), and a generic "aftermarket" charger. The generic aftermarket charger will not recharge the battery if the phone is turned on, although it will keep it from losing additional charge if I am using the phone. And it will fully charge the battery if the phone is turned off. The Samsung charger will recharge the battery regardless of whether or not the phone is turned on. Is this normal? Is there something wrong with the generic charger, or is it somehow not up to spec? Anybody else have this issue?