Actually a type 78 Battery is a side terminal design, a type 34 is the top terminal equivalent. You can also buy a dual terminal 34/78 battery. The type 24 battery is a top terminal design that has the same width and depth as a type 34 but is approximately 1 inch taller. The original battery in most 2nd generations was a type 74 which has an identical case as the type 24 but is a side terminal design. I don't know of anyone currently making a type 74 battery.
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