The Ferdinand was driven by a hybrid electric powertrain, and was armed with a long barrel version of the 88mm Flak cannon. The most common reason for losses was because the vehicle became stuck or broke down, and so the crews often had to destroy their own vehicles to avoid allowing them to be captured. It had a kill ratio of nearly 10:1, but as with most German wartime vehicles, lack of supplies made maintenance a serious problem, reducing the effectiveness of the vehicles, and forcing crews to destroy many otherwise operational vehicles.[25]