Figure 2 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 2: ODYSSEY
®
Battery OCV vs. SOC
As long as the battery has not been charged or
discharged for 6 or more hours, Figure 2 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?
Refer to Figure 3 below. At 77°F (25ºC), these
batteries can be stored for up to 2 years. The lower
the temperature, the longer the storage time. The
battery must be charged before storage.
Roughly every 18°F (10°C) increase in temperature
cuts storage time in half. If the temperature rises
to 95°F (35°C) the battery may be stored for only 1
year before a recharge becomes necessary. Figure
3 will apply only if the battery is fully charged before
storage.
State of Charge (SOC), %
Open circuit voltage (OCV), V
13.0
12.8
12.6
12.4
12.2
12.0
11.8
11.6
10 20 30 40 50 60 70 80 90 100
12.84V or higher indicates
100% SOC
Percent of 0.05C capacity
100
90
80
70
60
50
40
30
Open circuit storage time in weeks
10 20 30 40 50 60 700
77°F 113°F 149°F
ODYSSEY
®
BATTERY STORAGE AND DEEP DISCHARGE RECOVERY
SPECIAL NOTICE!
• CUSTOM V-TWIN MOTORCYCLE INSTALLATIONS USING ODYSSEY PC535, PC545, PC545MJ, PC680MJ
& PC925LMJ BATTERIES
If your V-Twin motorcycle is equipped with a standard 32 amp single phase stator/alternator and you ride at a low
engine rpm around town or even on long rides, the appropriate ODYSSEY
®
battery may run out of charge due to
low amperage output of the bike's stator at low rpms. After riding, turn the bike's engine off but leave the lights on
for 30 seconds. Then, turn everything off and connect the ODYSSEY Ultimizer
™
charger using the proper procedure
as detailed in the ODYSSEY Ultimizer charger owner's manual.
• Prolonged storage of vehicles with fuel injection computers, alarms, GPS and other electrical devices that require
continuous battery power to support active memories; this power drain must be offset with a maintenance-float
charger, periodic charging or disconnecting the battery to prevent the establishment of irreversible crystallized
sulphation in the battery plate oxide. Failure to address this destroys battery capacity and voids the warranty,
as this is not a warranted defect in materials or workmanship.
4
Publication No. 2602-0232, Rev. 11 - February 2013www.odysseybattery.com
Figure 3: ODYSSEY
®
Battery storage
time at temperatures
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