Buried deep within my article on HPIL files (see the "Articles" Forum, I placed the following tid-bit:
"If you get a 9114B Disk Drive, it will need a new battery, located inside the plastic battery holder. Get a direct replacement from Digi-key for $16.36 (Digi-Key Part No. P262-ND, Panasonic Part No. LC-R062R4PU). "
***the price has dropped, and is now listed at $9.45!!***
Believe it or not, you can find Digi-Key at www.digikey.com, and this particular battery at
http://www.digikey.com/scripts/US/DKSUS.dll?Criteria?Ref=26245&Cat=13500801
but hurry! Inventory shows only 2,900 left in stock!
PS: I'm not associated with digikey in any way, but I have bought some of these batteries from them and remain a satisfied customer.