What is the difference between milliampere and microampere?
Milliampere or “milli”, sometimes called “macro”, signifies that the amount of electrical current being supplied by the device is of the milliampere level. Milli is a prefix for 1/1000, or .001. So one milliampere is .001 ampere, a small amount of electricity. (An ordinary light bulb uses about 1.0 ampere of electricity.) In normal usage, the machine supplies 1 milliampere or less to the acupuncture needles. Microampere or “micro”, refers to electrical current supplied at the microampere level, or 1/1,000,000 of an ampere. So one microampere is .000001 ampere, a very small amount of electricity, only 1/1000 the amount of normal milliampere stimulation.
