 Varley adapted the Cyclon lead foil technology to produce flat plate batteries with exceptional high rate output.These gained approval for a variety of aircraft including the BAE 125 and 146 business jets, the Harrier and its derivative the AV8B, and some F16 variants as the first alternatives to then standard nickel cadmium (NiCd) batteries.Moves to higher capacity AGM batteries were led by GNB's Absolyte range extending to 3900Ah VRLA/AGM technology that is now widespread in both stationary and vehicle batteries.