i have had a RC9200 for about 2 years and the original battery pack lasted for about 18 months. and so i took a brand new battery pack from a TSU3000. it lasted a couple of weeeks and died. the marantz agent swapped over the power supply, docking station and another battery. 3 months later battery dead again. the remote works in the docking station but the batteries are not holding a charge. i spoke to the agencies remote "expert" and he keeps on saying that it was becuase the power supply was not regulated. which it was anyway. has anyone else had this issue?