When I first got my laptop (an iBook), the battery eventually wore down to the point where I needed to recharge every 20 minutes or so. This was maybe a year or so after I first got it, so getting a new battery wasn't too much of a big deal. I then heard that the battery would've lasted sooner if I had calibrated it, by letting the power run all the way down every time, then recharging back to 100%. So when I got the new battery, this is what I did.
Now, only a few months later, my battery seems to be wearing down yet again, despite this calibrating that I've been doing! Is that normal? Which way is better? Should I let it go down to 0% battery power before charging again? Or just leave it plugged in all the time like I was before? How can I improve my battery life?
Thanks for any advice.