Flight quality space nickel-hydrogen battery cells have been oncontinuous cycle life testing at Eagle-Picher since early 1982. Thereare currently over one hundred flight-type nickel-hydrogen cells on lifetest in ten separate tests. Cells are being cycled under severaldifferent regimes, including low Earth orbit (LEO), geostationary Earthorbit (GEO), accelerated LEO, and accelerated GEO. The nickel-hydrogentesting database is described. Cells are being operated at depths ofdischarge (DODs) ranging from 15% to 75% DOD. Cells under test range incapacity from 30 Ah to 80 Ah. Cells have currently accumulated 69000accelerated LEO cycles at 15% DOD, 41000 real-time LEO cycles at 30%DOD, 12000 real-time LEO cycles at 50% DOD, and 28000 cycles under areal-time LEO profile. GEO cycle life testing has accumulated 19 eclipseseasons at 75% DOD maximum. Prismatic aerospace nickel metal hydridecells have completed over 6400 LEO cycles at 40% DOD
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