Page 256 - Lindens Handbook of Batteries

10.8 priMAry bATTerieS

TABLE 10.2 performance, in Hours, of 1LM batteries on
Continuous and intermittent Discharge
end voltage
Type of discharge 1.1 V 0.8 V
4 ohms, continuous 8.9 9.9
4 ohms, LiFT * 10.7 11.6
4 ohms, HiFT 11 12
†
4 ohms, 30 min/h, 8 h/day 9.72 10.60
25 ohms constant resistance
Continuous 100 104
4 h/day 84.2 88.4
500 ohms constant resistance
Continuous 1265 1312
4 h/day 752 776

*Light industrial flashlight test, 4 min/h, 8 h/day.
†Heavy industrial flashlight test, 4 min/15 mm, 8 h/day.
Source: rayovac Corporation.

120

100
Percent of 20°C capacity 80

60

40

–20 0 20 40 60
Temperature, °C
FIGURE 10.9 performance vs. temperature of magnesium/
manganese dioxide cylindrical battery.

from the loss of water during the discharge. This opening of the can causes the voltage to rise about
0.1 V, also increasing capacity due to the air that can enter into the reaction.
The service life of the magnesium/manganese dioxide primary battery, normalized to unit weight
(kilogram) and volume (liter), at various discharge rates and temperatures is summarized in Fig. 10.10.
The data are based on a rated performance of 60 Ah/kg and 120 Ah/L.

10.4.2 Shelf Life
The shelf life of the magnesium/manganese dioxide primary battery at various storage temperatures is
compared with the shelf life of the zinc-carbon battery in Fig. 10.11. The magnesium battery is noted
for its excellent shelf life. The battery can be stored for periods of 5 years or longer at 20°C with a
total capacity loss of 10 to 20% and at temperatures as high as 55°C with losses of about 20%/year.