Replacement battery for A220 Feinwerkbau: MODEL 90 (FWB 90) AIR PISTOL 504A 18 MONTH WARRANTY 15V 60mah Alkaline FITS 10F15, 220, 220A, 2500, 504, 504A, 74, A220, A220/504A, A504, B154, BA332, BA332U, BLR154, DH554, DRY1720, E504, GP220, KA74, M504, MN154, TR149, U, V74PX, W10, W10E, Y10 Replacement A220/504A (Eveready 504 or NEDA 220) battery is Alkaline. Aftermarket Replacement for the hard to find Eveready 504 Free Shipping