Xterra 4WD V6-3.3L SC (VG33ER) (2003)
Battery: Service and Repair
Methods of Preventing Over-Discharge
The following precautions must be taken to prevent over-discharging a battery.
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The battery surface (particularly its top) should always be kept clean and dry.
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The terminal connections should be clean and tight.
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At every routine maintenance, check the electrolyte level. This also applies to batteries designated as "low maintenance" and "maintenance-free".
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When the vehicle is not going to be used over a long period of time, disconnect the negative battery terminal. (If the vehicle has an extended
storage switch, turn it off.)
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Check the charge condition of the battery.
Periodically check the specific gravity of the electrolyte. Keep a close check on charge condition to prevent over-discharge.