Lionel’s H0 trains used traditional Direct Current (“DC”) power to run the locomotives and traditional Alternating Current (“AC”) to operate accessories such as track switches, lights and the operating cars. Power was provided by several different Lionel-manufactured transformers, but most any H0 power pack could be used.
Lionel offered a number of power supplies for their H0 train line.
0103 800 milliamp Power Pack
The 0103 was commonly found in starter sets, but was also available separately. Rated at 0.8 Amps, Lionel described the unit’s output in milliamps to make it appear to be more powerful than it was.