I have a used laptop (IBM T20 Thinkpad) and the battery sucks unless I do very little (Word or Excel). I just bought a brand new battery, and before I put the battery in, I have a question. Do I need to do a burn in of sorts, or keep it out of the laptop when it's plugged in or what? I paid $50 so I don't want to be buying another every several months. Any help is appreciated. What I'm asking is could any of you please explain to me the initial charge process.