ok so i got the BT Apple Mouse n Keyboard , i've been using the Energizer Lithium batteries that came with them , after a month the batteries in the mouse died but the keyboard still has like 60-70% left . i got some normal Energizer max batteries yesterday , but toady they went down to like 80% ?? hmm so do u use rechargable ones? coz the lithium r expensive i get them for like 5$ a pair !