HTC TyTN / 8525 / JasJam (Hermes)

i've got several RAZR chargers sitting around from my old phone. They output 5v at 550mA while my 8525 charger is 5v @ 1A. I think that means the RAZR charger will just charge my 8525 slower. But i'm concerned there are smart features on the razr chargers telling it when to shut off.
any idea if this will work? maybe i should just spend the $50 or whatever for another 8525 charger.

man that thing is bad on batteries...