Oregon 33-500 Replacement Battery - 12.0V/2.5AHBBM supplies the part # 55 7520 battery as a replacement for the Oregon 33 500. This 12V 2. 5AH battery also known as the Toro 55 7520 battery fits the Oregon 33 500, Foley 105 018 and other Lawn Mowers (see below). This replacement battery is built by BBM in our ISO certified facility it utilizes 2 x 6 volt Enersys Cyclon 0819 0012 in series. These Pure Lead Batteries provide the utmost in performance for your Garden Equipment. Replaces Lawn Mower