pk232.31 PK232 Batteries. The battery holder inside of my PK232 had a habit of falling from the top cover via detioration of the adhesieve foam used to secure it in place. I also had concerns about the 3x AA cells leaking with age and possibly damaging the P.C. board. I decided to replace the 3 AA cells and holder and replace them with a Panasonic 3V lithium battery. It appears to be working ok since I have noted no memory loss, even though I went from 4.5V with the AA pack, to 3V with the lithium. the lithium cell used was a panasonic type "BR-1/2A" - O.E.M. part no "P134-ND" this battery is available from Digi-Key. their part no is "P134". you can piggyback the cell (a cylinder .67 in dia.) on top of the gray electro-lytic cap, next to the solder points for the battery on the p.c. Board. I used ordinary scotch tape to secure on top of the cap. (no more battery pack drop-sies!) hope u pk232 owners can use this info if u had/have the same problem! Signed: George, WA2RCB @ N3FOA, Philadelphia, Pa. 19134.