www.enersys.com Publication No. US-RE-IOM-002 January 2012 Page 35
12.3 Corrective Actions
Low electrolyte levels should be corrected by following the procedures given in Section 12.4
below.
If charger output voltage is not within the recommended voltage range, make adjustments. Then
determine the cause of the shift and correct the problem.
Keep cells clean, terminal posts and connectors corrosion-free, and grounds eliminated by
following the procedures in Section 12.1.
When cell temperatures deviate more than 5
o
F (3
o
C), from each other during an inspection,
determine the cause and correct the problem.
12.4 Adding Water
Cells on charge normally show a very gradual lowering of the electrolyte level over a period of
time, due to a loss of water from the electrolyte. Hydrogen and oxygen gasses are liberated by
electrolysis as a result of charging current. Cells also lose water from normal evaporation at a
rate relative to the cell temperature and the humidity. At regular intervals this water loss must be
replaced with distilled, deionized or approved water.
Only add water to the battery when the battery is at full state of charge or during equalize
charge. In this condition the electrolyte should be brought up ¼” from the bottom of the vent
well. Watering the battery when it is not fully charged may cause an overflow when the battery
does reach a fully charged state.
In cold climate with unheated battery rooms, water should be added only when the battery
temperature is 50
o
F (10
o
C), or above.
Never add any special types of powders, solutions or jellies to the batteries.
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