Recently, my Treo 600 died. It was acting like the battery was shorted. It would power on while on the charger, but as soon as you removed it, it would die. I took it down to the Sprint store where I bought it. Turns out, they have an on-site technician. An hour later they handed me a replacement, for a $10 deductable (or co-pay or however they put it). Real easy. Didn’t have to argue with anyone about what may have caused the problem (I’m not really sure, anyways).