Amp-Hours basically show how much energy a battery holds. Check the data sheet to make sure they will fit your case. Please note that some 15Ah batteries are slightly taller. As the dimensions of the 12 Volt 12Ah battery and the 12 Volt 15Ah battery are the same, they are interchangeable. Simply put both versions will fit in your application and will work fine. What is the difference between the 12Ah battery and the 15Ah battery? Why would I upgrade? EVX12120 - 12V 12Ah - High Cycle - Terminal F2 - Click here to view.UB12150 - 12V 15Ah - Terminal F2 - Click here to view.EVH12150 - 12 Volt 15Ah - Extended Run - High Cycle - Terminal F2.Would you like to upgrade to a higher capacity battery which can offer a longer runtime: HR1251WF2FR - 12 Volt 13.5Ah - 51 Watts Per Cell - Terminal F2.UPS - Uninterruptible Power Supply - Battery upgrade options:
DOT 60 classified for easy transportation. Reliable power for critical applications. Exceptional leak resistance even in an upside-down position. Excellent resistance to vibration, shock, chemicals and heat. Our maintenance-free sealed lead acid batteries with absorbed glass mat technology offer outstanding performance withstanding high current output and deep cycling.