A while ago I bought a 667 Ti-book off ebay and along with the decent one installed, it also came with a new, unopened aftermarket battery too. After a while, paranoia has got the better of me and convinced me that leaving a new battery 'on the shelf' will do more harm than good, so decided to open it and give it a charge. Firstly, I found that it wasn't a battery for a Ti-book but one for a 15" Al model - which I also have, so no harm done there. I fitted it and charged it to full, ran it down to 10%, then charged it back up again and put it back in it's pack. Has anyone had any experience of this? Is it better to leave a Powerbook battery untouched until needed or keep it 'topped up' ?