[Xtraz]

So I have two batteries, and both performed pretty well, giving me 2.5 hours or so at full brightness.

Ever since I upgraded my RAM and harddrive (to IBM 40GNX) though, the battery life went down (expected). But what was strange was that my first battery now only gives me a little more than an hour, whereas my second battery still gives two hours or so. I timed it with my stopwatch and it verified the estimated time (nice estimation algorithm, Apple).

But my question is... How can adding a few components made such a drastic difference between the two batteries? I didn't notice such a disparity before... maybe my first battery is dying?

[nana4]

A LiIon battery is good for between 300-500 full charges on average before performance drops dramatically. How old is the battery?

[Kristoff]

It's normal...the one is on its way out.

I have two pismo batteries.

Just recently, the one I use the most has dropped in capacity drastically.

All part of the LiIon lifecycle.