RAM Upgrade and Batteries

[weng hui <whui@indiana.edu>]

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