AMER-EN-IOM-ODY-0523
www.odysseybattery.com
8
V. TECHNICAL DETAILS
A. OPERATING TEMPERATURE RANGE
Temperature impacts the life and performance of AGM
2
batteries, as it does all batteries. In general,
higher temperatures reduce battery life while lower temperatures reduce the available capacity that a
battery can provide. Refer to Table 3 below for the operating temperature range for each model.
Battery Model
Maximum Operating Temperature Range
ODP-AGM
All models
-40°F (-40°C) to 140°F (60°C)
Except ODP-AGMDIN sizes
(with or without ODYSSEY
®
Connect battery
monitoring system)
-40°F (-40°C) to 113°F (45°C)
ODX-AGM
All models
-40°F (-40°C) to 176°F (80°C)
ODS-AGM
Powersports (without metal jacket)
-40°F (-40°C) to 113°F (45°C)
Powersports (with metal jacket)
-40°F (-40°C) to 176°F (80°C)
Marine and RV
-40°F (-40°C) to 104°F (40°C)
NSB-AGM
All models
-40°F (-40°C) to 176°F (80°C)
Table 3
B. UNDERSTANDING STATE OF CHARGE
SOC
OCV
100%
12.9
75%
12.6
50%
12.2
25%
11.9
0%
11.5
Table 4
Like all batteries, it is best that AGM
2
batteries be kept at
a high SOC. It is important to understand how to
determine the SOC of AGM
2
batteries correctly. The
approximate SOC value is found by measuring the
battery’s Open Circuit Voltage (OCV) with a high-quality
voltmeter. The voltage reading must be taken at least four
hours after the battery finishes charging or at least 30
minutes after it finishes a discharge. Measurements will
not be accurate if adequate rest time is not allowed.
Table 4 shows the typical relationship between OCV and SOC.
C. STORAGE AND SELF-DISCHARGE
Table 5
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
Even if batteries are not installed in an
application and are being stored, their SOC
declines over time. The rate at which a
battery loses charge depends on the
temperature. The warmer the temperature
the shorter the storage time before a
freshening charge is required. Cooler
temperatures slow down the rate of
self-discharge. A good rule of thumb to use
is that for every 18°F (10°C) rise in temperature the storage time is cut in half. This means that the
storage time at 95°F (35°C) is half the storage time at 77°F (25°C).
If stored at 77°F (25°C) or lower, ODYSSEY
®
AGM
2
batteries should be given a freshening charge at
least once every two years or when the OCV drops to about 12.2 volts, whichever comes first. This
