Registered: Mar 2001
Location: Moncton, New Brunswick, Canada
I was doing a little research on the life of my Prism rechargable and came up with this from the FAQ page of makers of the battery, GS-Melcotec
"A. The cycle life of an individual cell is determined by various factors including charge and discharge management, frequency of use, temperature environments, etc. Under normal usage a GS-MELCOTEC Li-ion cell would be expected to yield >80% of original capacity after Min. 500 Cycles."
I believe that by Min. 500 Cycles they mean draining the battery to minimums before recharging, but I'm not sure. If you charge the batttery as often as possible, via an emergency charger if neccessary, you'll extend the life of the battery significantly. This holds true even if you use the handheld a lot. I imagine the internal battery in the Pro is very similar, if not the same as the battery in the Prism.
Personally I use a emergency charging kit from
Tech Centre Labs. It's really nothing more than a Radio Shack AA Battery case that connects to the prism via a visor serial dock. I use 4 NiMH AA rechargables, and bring a Radio Shack travel charger with me ( the one that will connect to your cigarette lighter in your car) because it is very compact, and it works beautifully for me. I've never run out of recharging power.
Hope this helps!