Figure 1 shows the relationship between
Open Circuit Voltage (OCV) and State of
Charge (SOC) for the ODYSSEY
®
battery.
(A) How do I know the state of charge
of the battery?
Figure 1: ODYSSEY
®
battery OCV vs. SOC
As long as the battery has not been
charged or discharged for 6 or more hours,
Figure 1 can be used to determine the
SOC of the ODYSSEY battery. Use a high
quality digital voltmeter to measure its
OCV. The graph shows that a healthy,
fully charged ODYSSEY battery will have
an OCV of 12.84V or higher at 77°F (25ºC).
(B) How long can the battery be stored?
ODYSSEY batteries should be fully charged
prior to storage. Fully charged ODYSSEY
batteries can be stored for up to 24 months
at 77ºF (25ºC). Battery voltage naturally
decreases with time and with increased
temperature. The battery voltage should be
checked periodically. If the battery voltage
drops to 12.0 volts (35% SOC) it should be
recharged immediately to avoid permanent
battery damage. The following can be used
as a rough approximation for the potential
storage times at different temperatures.
Storage
Temperature
Storage Time
(Months)
41°F (5°C) 48
59°F (15°C) 36
77°F (25°C) 24
95°F (35°C) 12
113°F (45°C) 6
6
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