How to Ensure Your Battery's Fluid Levels Are Correct

How to Ensure Your Battery's Fluid Levels Are Correct

26 January 2023
 Categories: , Blog


In the modern era, most car batteries are marked as "maintenance-free" and are essentially sealed. But there are still some models around that you may need to keep an eye on to ensure that there is sufficient fluid within. Why is this important, and what should you do if you need to add some liquid?

Check the Electrolyte

Inside a car battery is the electrolyte, which is a mixture of purified water and sulphuric acid. It's a toxic combination and needs to remain in its place because if it comes into contact with human skin or sensitive materials, it's not a good picture. So instead, the electrolyte level needs to be carefully maintained for the battery to function as it should.

Add Distilled Water

For the battery to function as it should, you must ensure that there is a sufficient amount of distilled water — never too much and never too little. Do not be tempted to add tap water because you don't have any distilled on hand, as this may damage the battery.

How to Fill the Battery

When filling the battery, pay close attention to the "max" line and never overfill. If you do, the electrolyte may expand as the battery is being charged and could force its way out of the cell vents.

Deal with Evaporation

The battery is almost certain to lose some distilled water as time goes by. After all, the unit heats up as it is charged, which can cause some evaporation. However, when the fluid level falls below the top of each plate, it will start to lose efficiency. If you don't take action to refill the battery, you cannot expect it to function as it should, and it will certainly fail before its due time.

Avoid Electrical Issues

You should also ensure that your car's electrical system is in top condition. After all, if the alternator develops a fault and overcharges the battery, this could lead to a loss of electrolytes and further issues.

Check the Density

While you are filling the battery, it's a good idea to check the specific gravity (or density) using a simple tool known as a hydrometer. You can pick these up at a car parts outlet and use them like a syringe. Insert it into the battery cell and draw in a sample of electrolyte while being careful to avoid any contact.

Handover to the Experts Instead

If you're a bit apprehensive about the electrolyte or cannot imagine trying to manipulate a hydrometer, leave it to the experts instead. Make sure that you schedule a service visit, and a mechanic will quickly take care of all the details. 

For more info, contact a local car battery provider