IBM ThinkPad T42 Battery are made from a grade cells and highest quality parts, the IBM laptop battery are tailored made according to the original size, whether the battery appearance, size and quality are the same as with the original. Every IBM ThinkPad T42 laptop battery should be under strict quality control including filtration and safety testing of voltage,capacity and battery core before leaving the factory, and has passed the authentication of CE, UL, EMC, CQC,ROHS, etc.
This is a late review as I have been using the battery for 2 1/2 years and it still retains +/- 90% of it's original life. I'll buy another as soon as this one dies.
This battery was by far the best I could find, and it has worked beautifully. Thank you.
I've been using this battery for about a month now. I'm very happy with it, hold charge, and discharge at a reasonable rate. With this battery pack I get an extra two hours of battery life. We'll see how well it lasts after a year or so of use, but for now I'm very pleased.