We review and test ChiBatterySystem's 72 volt 38.25 amp hour Gladiator X battery and Green Line Engineering's ASI BAC4000 Power Upgrade Kit for the Sur-Ron X. Previously we were using the stock 60 volt 31.9 amp hour battery and stock controller. We'll talk about the power, speed and range of this 72v combo setup and then test it out on the road.

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