Installation Manual
9
INSPECTION & INITIAL CHARGE  
OF FLOODED LEAD ACID BATTERIES
WARNING
• ALWAYS WEAR THE PROPER PERSONAL PROTECTIVE EQUIPMENT 
(GOGGLES, GLOVES, CLOTHING) WHEN HANDLING FLOODED BATTERIES  
AND ELECTROLYTE.
• WET BATTERIES MUST BE FULLY CHARGED BEFORE BEING DELIVERED 
TO THE END USER.
• UNLESS INSTRUCTED BY ROLLS TECHNICAL SUPPORT, NEVER ADD 
ACID TO THE BATTERIES AT ANY TIME. USE DISTILLED WATER ONLY. 
•   FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT 
IN MALFUNCTION AND WILL VOID WARRANTY.
A battery may not be fully charged when received. An initial charge brings the
battery to an operational state. Before charging, inspect for physical damage, 
check polarity and electrolyte levels in each cell. Ensure the electrolyte (liquid) 
covers the plates completely. It is normal for electrolyte levels to lower as the 
battery case will relax (bulge) slightly after filling. If the plates are exposed, add 
distilled water until all are just submerged. It is important not to overfill each 
cell as the electrolyte level will rise during the charging process. Charge voltages 
are indicated in Table 2 (a) & 2 (b) Flooded Charging Parameters.
INITIAL INSPECTION & CHARGING
1. Inspect batteries for damage. Important: read all warning labels on batteries 
before proceeding.
2. Wet batteries are fully charged and tested before shipping, however batteries 
will self-discharge when not in use during transportation and storage. The first 
charge brings the battery to an operational state. Before this charging process, 
electrolyte levels should be checked, making sure the plates are covered in 
each cell. If required, add distilled water until all the plates are submerged. It is 
important not to over fill because the level will rise during the charge process.
3. Check for correct polarity. Attaching the positive and negative voltmeter lead 
to the positive and negative battery terminal should give a positive voltage 
reading. If it is negative, a reverse polarity condition exists and you should 
contact your dealer or Rolls Battery Technical Support.
4.   Place batteries on charge. Please see Table 2 (a) & 2 (b) Flooded Charging Parameters  
for required charging settings. Do not let the cell temperature exceed 52°C (125°F). 
If the temperature becomes excessive or the cells begin to gas vigorously, reduce 
the rate of charge. Continue charging until all cells reach the specific gravity of 
the filling acid. All cell specific gravities should be even (1.260-1.280).










