I am having a IBM ThinkPad T40 which got some issue and i am troubleshooting the same. It is telling me to remove the Backup Battery and the Battery Pack. I have successfully removed the Battery Pack from the same. But when looking for BackUp Battery i am unable to do the same. I have gone through all the manual but did not get any instruction regarding the BackUp Battery. If any one is having the download the same. Thanks you.