Thanks to all who responded to my request for info. on IC DRAM card for my tp750. I finally got a 16MB card for $600 nett. - no problem so far. Does anyone know what is the average lifespan of the NiMH battery pack ? Also, to preserve its lifespan, is it better to charge/discharge repeatedly or to use the AC adapter whenever possible ( to reduce the frequency of recharging) ? Thanks again. Weng