Two 12v 18ah batteries run a 500w motor using a 24v controller (amperage spec not available). It recently stopped running. Upon inspection, I found the connectors going from the controller to the motor cable were melted together. Figured it might be a good time to upgrade this thing with a performance kit offered by a vendor who specializes specifically in modifying Cruzin Coolers (not a typo).
Top speed on this thing with me at 170lbs is 13mph or a slight decline. Used the Speedometer app on my phone. Matches the manufacturer's top speed spec to the T.
I use this thing as my stroller for my daughter and I to cruise through fairs, festivals, farmer's markets and other outdoor events. Top speed is fun, but I wouldn't want to go that fast with her on it and particularly in a primarily pedestrian environment, the ideal speed is about 2-4mph with occasional bursts of speed a bit higher to pass crowds and maybe show off a little.
I'll be adding a 3rd battery to the system. In order to fit everything nicely in the battery case/compartment, I'll need to sacrifice the amperage on each battery. The battery case will hold three 12v 15ah batteries nicely. The importance of it all fitting nicely in the battery case is so that I can move it in and out of the car independently of the cooler itself. Combined, it probably weights maybe 90lbs or close to it. Best to have it separate when loading into my sedan trunk. I might be 170lbs, but it's far from all muscle.
The controller will be upgraded to a 36v to handle the extra power.
The throttle will be upgraded as well with a battery readout so I know how much juice is left.
I haven't bought it yet, but I'll be adding a speed controller so I don't accidentally push this thing to 23mph top speed and my put my daughter at risk. We wear helmets, but best to stay as high off the asphalt as possible. Don't want any collisions.
The main purpose of this upgrade is for torque. Speed as I mentioned would be awesome, but there wouldn't be much realistic opportunities to really use it unless I'm going up and down the street by myself which would be rare and reserved only for test runs. The thing stock doesn't take on inclines. It finds even the shallowest driveways to be a challenge.
With my experience from overvolting the Sharper Image mini scooter you see in my avator, I'm confident that this thing will see the performance increase I'm expecting.
The kit has arrived and should be waiting for me when I get home from work (late night this evening). Batteries were purchased from another vendor due to availability and those won't arrive until the end of the week. It's still sitting in some USPS warehouse in Colorado.
Photos pending, but check out my handle at Instagram @ricecooler if you want to see the before pictures. Everything's housed inside the cooler and I only have one shot of the inside, so not much to see but you may want to take a look to see what I'm working with.
I want to extend my gratitude to bassiclyLouDog who totally hooked me up with all the info I needed up modify my Sharper Image mini scooter. He helped with the overvolting which has done me well. It's been years and I've been riding it regularly ever since. Loving it so much. It's still my mode of transportation for going to pick up some to-go dinners to bring back to the house.
Mini Scooter: http://e-bikeconversion.blogspot.com/2012/05/modded-scoot-inherits-36v-battery.html