Paslode Impulse is a trademarked name for a cordless nail gun manufactured by Paslode. Cordless nail guns do not need an air compressor. Instead, they use what Paslode calls a "fuel cell", but is actually a very small two stroke engine which fires one ignition stroke for each nail driven, and reloads itself from a small metal can filled with pressurized flammable gas. It has a battery pack and a high-voltage power supply, to deliver a spark.