Police tasers use either a lithium energy-cell power supply system contained within a performance power magazine or a magazine of rechargeable NiMH batteries, states Taser International. Some personal defense models use standard AA batteries.
The taser deploys probes attached to fine wires that connect to the target and delivers electrical pulses into the target's nervous system, according to Taser International. These pulses disrupt the electrical signals the human brain uses to communicate with the muscles. The results include involuntary muscle contractions and severe impairment of motor skills, which effectively subdue the target without causing serious injury. Since the taser current does not rely on brute force or pain, it is an efficient means for nonviolently incapacitating violent persons of all sizes.