Mighty Max Battery 12V 75AH GEL Battery Replacement for Wayne WSS30V Backup Sump Pump vs 12V 100AH GEL Battery Replacement for Liberty Sump Pump

Buy the Mighty Max if you want a documented deep-cycle gel battery with a real spec sheet: 75 Ah, 540 cold cranking amps, BCI group 35, and a stated one-year warranty. The 100 Ah gel is the larger capacity choice, but its listing is thin and reads like a generic equipment part, so you can't confirm cranking amps, terminal type, dimensions or warranty. For a sump pump backup, capacity matters less than fit and a charger that matches the battery's chemistry.

• Choose the Mighty Max if you need a battery whose group size, terminals, weight and cranking amps you can check against your pump's tray and charger before you buy.
• Choose the 100 Ah gel if you have confirmed the physical size and terminal layout fit your Liberty setup and you want more reserve capacity for longer outages.