This mode of power will usually be allowed in waters that will not allow nitro or gas. They can be very fast but as the battery is used, power starts to dissipate. The fuel for these engines consists of Nitro Methane, Methanol, and lubricants - not gasoline. The smaller, entry-level nitro engines are available with recoil or electric starters. The larger engines require additional starting equipment.
Nitro boats are primarily direct drive.
This means when the engine is running, the prop is spinning. Historically, nitro boats are the fastest. The advantages to nitro boats are their speed and unlike electric powered craft, these have full power until the tank is dry. The disadvantages are that they can be loud, and you must be cautious of the spinning prop. Nitro boats are available in various hull designs and material.