Amazon.com: Exell Battery A640PX fits Zenith Royal 20, MDL 2FA-24W Transistor Radios : Health & Household
Amazon.com: Razor W15128190003 36 Volt 12 AH MX500 & MX650 Battery Pack Includes Battery Wire Harness (3) 12V 12ah Easy Slide on Terminals Versions 1-7 (This Will not Fit The Razor 500