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75%
1.225
12.4
6.2
50%
1.190
12.2
6.1
25%
1.155
12.0
6.0
Discharged
1.120
11.9
6.0
IMPORTANT
This battery state voltage chart is used as an example. Your specific battery manufacturer's chart may vary.
Note: Both voltage and specific gravity tests should be performed with no load on the batteries and without any supplied
charging. Turn off all draws and charging. Allow the batteries to stabilize, and then proceed with the test.
BATTERY MAINTENANCE
Battery maintenance is an important issue often overlooked by many RV owners and technicians. As batteries age, their
maintenance requirements change. This means longer charging time and/or higher finish rate (higher amperage at the
end of the charge). Usually older, serviceable (unsealed) flooded batteries need to be watered more often, as their
capacity decreases over time.
WARNING
Before attempting battery maintenance, make sure all coach power sources are disabled (ignition, generator,
shore power, inverter).
COMMON CAUSES OF PREMATURE BATTERY FAILURE
Source: http://www.batterystuff.com/kb/artic...ry-basics.html
• Deep discharges (leaving your lights on)
• Misapplication
• Replacement using an undersized battery not meeting Newmar's OEM specifications
• Loss of electrolyte due to overheating or overcharging
• Undercharging or loose alternator belt
• Excessive vibration (due to loose clamp or hold down on battery)
• Corrosion
• Freezing (A fully-charged vehicle battery will not freeze until the temperature is -75° F. Frozen batteries are not
warrantable.)
• Failure to charge a battery during a period of six months or more (Inactivity can be extremely harmful to all lead
acid batteries.)
BATTERY SAFETY GUIDELINES
WARNING
Prior to handling or working with a lead-acid battery, consult your battery owners' manual for instructions and
safety precautions.
Lead-acid batteries contain hydrogen-oxygen gases that may be explosive and sulfuric acid that may cause severe
burns. To avoid injury, observe these precautions when handling or working with a lead-acid battery:
• Wear ANSI (American National Standards Institute) approved safety glasses or goggles, as well as a face shield.
• Wear proper clothing to protect your face, hands, and body.
© 2018 Copyright Newmar Corporation. All rights reserved. For the most up-to-date version of this content, and for more product-specific information, please refer to Newgle.
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