MIL-PRF-81757D (W/AMENDMENT 1), PERFORMANCE SPECIFICATION: BATTERIES AND CELLS, STORAGE, NICKEL-CADMIUM, AIRCRAFT, GENERAL SPECIFICATION FOR (18 FEB 2005) [SUPERSEDING MIL-B-81757C]., This specification covers the general requirements for rechargeable, vented, nickel-cadmium aircraft storage batteries, cells, and all components (electrical and non-electrical) thereof.