Secondary battery Types Silver zinc Nickel cadmium Nickel hydrogen nergy densi 90 (Wh/kg) nergy densi 245 60 (Wh/dm) Oper Temp(deg C)10-20 0-20 0-40 Storage Temp(C) 0-30 0-30 0-30 Dry Storage life 5 yr Wet Storage life 30-90 days yr 2 Max cycle life 200 20.000 20.000 Open circuit 1.9 1.35 1.55 (V/cell) Discharge(V/cell) 1.8-1.5 1.25 1.25 Charge(V/cell) 2.0 145 1.50 Manufacturers Eagle-Pitcher Eagle-Pitcher Pitcher, Yardney Gates Aerospace Yardney, Gates Technical Prod Batteries HughesSecondary Battery Types Silver zinc Nickel cadmium Nickel hydrogen Energy density (W h/kg) 90 35 75 Energy density (W h/dm3) 245 90 60 Oper Temp (deg C) 0 – 20 0 – 20 0 – 40 Storage Temp (C) 0 – 30 0 – 30 0 – 30 Dry Storage life 5 yr 5 yr 5 yr Wet Storage life 30 – 90 days 2 yr 2 yr Max cycle life 200 20,000 20,000 Open circuit (V/cell) 1.9 1.35 1.55 Discharge (V/cell) 1.8 – 1.5 1.25 1.25 Charge (V/cell) 2.0 1.45 1.50 Manufacturers Eagle￾Pitcher,Yardney Technical Prod Eagle-Pitcher, Gates Aerospace Batteries Eagle-Pitcher, Yardney, Gates, Hughes