Guide
USER’S GUIDE
17
USER’S GUIDE
17
Table 7
State of Charge as a Measure of Specic Gravity and Open-Circuit Voltage
Percentage Charge Specic Gravity
Open Circuit Voltage
Cell 6 Volt 8 Volt 12 Volt
100 1.277 2.122 6.37 8.49 12.73
90 1.258 2.103 6.31 8.41 12.62
80 1.238 2.083 6.25 8.33 12.50
70 1.217 2.062 6.19 8.25 12.37
60 1.195 2.04 6.12 8.16 12.24
50 1.172 2.017 6.05 8.07 12.10
40 1.148 1.993 5.98 7.97 11.96
30 1.124 1.969 5.91 7.88 11.81
20 1.098 1.943 5.83 7.77 11.66
10 1.073 1.918 5.75 7.67 11.51
4 .1 Storage in Hot Environments (greater than 90°F or 32°C)
Avoid direct exposure to heat sources, if possible, during storage. Batteries self-discharge faster in high
temperatures. If batteries are stored during hot, summer months, monitor the specic gravity or voltage
more frequently (approximately every 2-4 weeks).
4.2 Storage in Cold Environments (less than 32°F or 0°C)
Avoid locations where freezing temperatures are expected, if possible, during storage. Batteries can
freeze in cold temperatures if they are not fully charged. If batteries are stored during cold, winter
months, it is critical that they are kept fully charged.
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