this is mostly anecdotal but I believe that's the same composition battery I have in a palm tungsten. I bought the palm ~6 years ago, charged it almost daily for the first 3-4 years and now about weekly because I use it much less. I think originally it ran for ~3 continuous hours on a charge and over the years that's dropped to ~1 hour.
the screen is completely unresponsive in places, I've lost/broken 5 stylii, the on/off button hasn't worked for 3 years and I'm on my second case. but the battery is still chugging away and suspect I'll be tossing the pda before it stops taking a charge
