Speeds range from five miles per hour to a very fast 25 miles per hour depending on the battery. Most roller blades that have electric power have the battery attached to the roller blade but larger and faster models are available with a huge battery that can be carried in a backpack. The advantages of this type of battery are longer riding time between charges and a lower level of power loss due to discharge. The better models of electric roller blades use a deep cycle battery. The idea is to match the amount of power to the terrain and the size of the rider.

The size and the weight of the roller blades increase with increasing power. The user gets the option of a power source that varies from six volts to 24 volts. The majority of motorized roller blades on the market are electric. The advent of electric and motorized roller blades means a rollerblader can go almost anywhere. The motor can be run all of the time or simply kicked on when the ground gets too steep or too tough to keep going. The basic idea behind motorized and electric roller blades is the need for speed and the need for a little assistance in negotiating rough terrain. Improvements in battery technology solved the problem. The problem designers faced was having a power source that was small enough to be suitable for roller blades and powerful enough to do the work for any sized rider. People have toyed with the idea of putting a power source other than human legs on roller blades for about a decade before the first true motorized roller blades came on the market.

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