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22.1 NOTES AND WARNINGS ON VPL BATTERY FUNCTION AND EXTREME TEMPERATURES
Batteries are negatively affected by extreme hot, or cold, temperatures and such temperatures can
permanently damage batteries even if such extreme temperatures linger only momentarily.
A low state of charge is the main culprit in cold weather battery damage and reduced functionality.
Remember, the lower the state of charge, the lower the electrolyte level, the more likely a battery is to
be damaged by cold weather.
Warming once frozen batteries will not rejuvenate them; freezing damage is permanent.
Always keep your batteries 100% charged in cold temperatures.
Never let a battery discharge in cold temperatures – battery damage is likely to result.
Charging a “dead” battery in the cold, can cause internal off-gassing, causing expansion of the casing
which could result in casing rupture and battery acid leakage. So, always keep your batteries 100%
charged in cold temperatures.
“Water” in a “dead” battery can freeze at 32
0
Fahrenheit (0 °Celsius). Freezing water can expand and
rupture the battery casing, causing leaks.
Battery blankets being left on a battery during warmer (not at or near freezing) periods can cause
battery damage. Be sure to consult your battery dealer for more information and guidance.
Follow your battery blanket manufacturer’s directions. Consult your battery dealer for more information
and guidance.
THE COMMON THEME IS: A LESS THAN FULLY CHARGED BATTERY IS EXPECTED TO BECOME
DAMAGED IN COLD ENVIRONMENTS. SO, NEVER LET YOUR BATTERIES DISCHARGE IN COLD
WEATHER.
While not exact in every situation, Table 1 below is the conventional battery Cold-Weather Rule of
Thumb. Note these values are based on an undamaged battery.
STATE OF CHARGE (%) FREEZING TEMPERATURE
100% .......................................... -90
0
F
50% ........................................... 5
0
F
20% ........................................... 32
0
F
TABLE 1
22.2 VPL BATTERY SPECIFICATIONS
Model ............ MK ES12-12 Length .......... 5.94” (151 mm)
Type ............... AGM Width ........... 3.86” (98 mm)
Voltage........... 12 V Height .......... 3.8” (98 mm)
Capacity ......... 12 Ah Weight ......... 7.96 lbs. approx. (3.6 kg)
22.3 BATTERY CROSS REFERENCE (SUBSTITUTES/EQUIVALENTS) GUIDE
Battery manufacturers may update battery descriptions, dimensions, charging properties and
capacities, as well as recommended functions and usage requirements. So, always consult your
battery blank manufacturer for additional information before deciding regarding the use of a
battery blanket for your application.
• Many, if not all, of the 12 battery equivalents listed below can be obtained from your local
hardware stores as well as online.
22.4 BATTERY SUBSTITUTES/EQUIVALENTS
1. KUNG LONG WP12-12
2. UNIVERSAL UB12120
3. MK EAST PENN ES12-12
4. CSB GP12120
5. B&B BP12-12
6. PANASONIC LC-RA1212P
7. LEOCH DJW12-12HD
8. VISION CP12100
9. EAGLE PICHER CF-12V12
10. POWER PATROL SLA1105CSB
11. CSB GP12110F2
12. POWERSONIC PS-12120
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