Battery maintenance- How to Test and Maintain
Easy to follow steps of How to Test and Maintain your VRLA Batteries:-
1. Always keep VRLA battery tops and terminals clean.
2. Coat terminals and connections sparingly with petroleum jelly or similar.
3. Keep terminals tight, but NEVER over tighten.
4. Check regularly that electrolyte is 3 mm (1/8”) to 6 mm (1/4”) above the top of the plates. If topping up is required, use only distilled water or chemically pure water.
5. Check alternator/generator belt regularly for signs of wear and ensure it is tensioned to the manufacturer’s recommendations. Keep belts tight not loose.
Before testing the battery with instruments, above all make a visual examination.
1. Corroded terminals – a white powdery substance around post connections which may prevent battery charging.
2. Check that all cells contain electrolyte. A dry cell indicates a cracked casing.
3. Check for loose terminals and any other external damage.
4. Record what you see on paper or digitally.
Use a hydrometer to establish the specific gravity and state of charge of the sulphuric acid in the battery.
1. Do not add distilled water.
2. Keep the barrel upright. Draw up enough electrolyte from each cell in turn to allow the float to ride free.
In some instances means you may need to tilt the battery to obtain sufficient electrolyte.
Then, read off the hydrometer at eye level.
1.270 to 1.280 S G Full Charge
1.220 to 1.230 S G Half Charge
1.150 to 1.220 S G Discharged
The readings from all cells should be within 0.030 points.
If the variance is greater, it is highly likely that the battery needs replacing.
If all cells are consistently low, it is possible that the battery may still be serviceable,
however we would advise a REPLACEMENT as soon as possible.
Any and all Battery maintenance should be undertaken by a trained technician, who works with batteries.
Search – Knowledge Base