12 Volt SLA 12 V 32 or 33 AH Sealed Lead Acid Batteries, Chargers and Adapters at PlanetBattery.com.
This is more the amp hour rating you would need for a golf cart in which half its weight is batteries(I'm pretty sure the Ez-gos I've been in were more like 75% because you could carry them if you put the cell on the ground.) Also it will be able to go for maybe 45 minutes at ~20 mph carrying two moderately sized people and nothing else.
Now that I am awake the easiest way to consider it is to convert to power. 370 volts 220 Ah is 81 KWHrs or. . .like 110 HPhrs. so you can run 55 hp for 2 hours. Not quite though, it will hold steady for the first half and then rapidly drop off. Not to mention its a bad idea to get your expensive batteries below say 20%. Why people rate the charge time from 20-100%.