Recently acquired hp Compac nc8230 XP Pro sp2, obviously with Bluetooth Bought a new Dell keyboard and Kensington mouse to go with it. I'm only getting somewhat less than 30 hrs use out of a pair of coppertop AA's in either device Is this normal? Seems maybe I better invest in some good quality rechargeables at this rate - I use the machine up to 8 hrs or so daily. What ARE some good quality rechargeables that hold power well? I know some don't retain "memory" and therefore lose charge capacity over repeated charges I've forgotten which are the good type, i.e. NiMh or whatever? Also what brand / model hold the longest lasting charge? Thanks!!!