Information

Temperature Compensation Explanation
--- for the digital battery Tester BT--
dated Feb.02, 2007
The battery performance is affected by temperature. When cold the battery produces less power.
The test results of a cold battery will be lower than the actual condition. The user can
compensate for this difference by the remarks as follows:
I.
II.
BATTERY CAPACITY CCA (COLD-CRANKING AMPERAGE)
When battery tested at 70°F (21.1°C), the battery capacity rated at 300 CCA, the voltage is
10.4V and the min. cranking volt at 9.7V. And then for battery capacity rated at other
ranges(CCA), add 0.1V for every 50 CCA when testing air temperature at 70°F (21.1°C) .
III.
Voltage Tested Reference Chart for Temperature Compensation:
CCA Range 300 400 500 600 700 800 900 999
Load Voltage 10.4 10.6 10.8 11.0 11.2 11.4 11.6 11.8
Min. Cranking volts at 7
0°F (21.1°C) &
above
9.7 10.0 10.3 10.6 10.9 11.2 11.4 11.6
Min. Cranking volts at 6
0°F (16°C)
9.6 9.9 10.2 10.5 10.8 11.1 11.3 11.5
Min. Cranking volts at 5
0°F (10°C)
9.5 9.8 10.1 10.4 10.7 11.0 11.2 11.4
Min. Cranking volts at 4
0°F (4°C)
9.4 9.7 10.0 10.3 10.6 10.9 11.1 11.3
Min. Cranking volts at 3
0°F (-1°C)
9.3 9.6 9.9 10.2 10.5 10.8 11.0 11.2
Min. Cranking volts at 2
0°F (-7°C)
9.2 9.5 9.8 10.1 10.4 10.7 10.9 11.1
Min. Cranking volts at 1
0°F (-12°C)
9.1 9.4 9.7 10.0 10.3 10.6 10.8 11.0
Min. Cranking volts at
0°F (-18°C)
9.0 9.3 9.6 9.9 10.2 10.5 10.7 10.9