The only laptop I have, is an old Compaq Presario. I need to replace the battery and I have a questions that Google isn't helping with. The battery I have, is a 9.6V NiMH...but most of the replacement models are 14.4V Li-on. So can I just replace the one I have with the 14.4V battery? And if so, would I need a new power adapter? Or do I need to stick with a 9.6V replacement?