Proper Checking & Charging Motorcycle Batteries


Motorcycle batteries lose their charging power if they left unused for a time period just like all lead batteries.

Do you know how to check your battery if it is good or bad? Let’s first clear up the misconception that the power of motorcycle batteries gets leak just like the water.


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A motorcycle battery is a lead acid battery in a plastic box having delicate balance of chemicals inside which interact with each other in order to produce electricity after applying load.

However, if your battery does not produce electricity then there are chances of chemical issues.

But how would you know that your battery is having any issue or it is bearing a good health or not? Or do you need to charge your battery or not? How you will charge your battery if required? We, at Siima MotoWear have discussed all your queries here.


multiple layers motorcycle adventure jacket

1. Inspect the motorcycle battery

Sometimes giving a good look to your battery can tell you if your battery is good or bad. How? Inspect these few things

• Bulge or bump in the case of the battery

• Rupture or Crack of the plastic

• Broken terminal

• Excessive leaking of chemicals

• Any kind of discoloration

If there is any budge in the case but the battery is intact, then it is because of overcharging of the battery. Other signs of physical opening in the case are often caused by mishandling. However, any kind of cracks, holes and splits will not stop a battery to work but for safety such kind of batteries should be labelled as unsafe.


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Loose or broken terminals of the battery are dangerous and can lead short circuit. There would be indication of melting or burning in case of short circuit. When short circuit occur all the power of the battery is unloaded instantly which produces a good amount of heat and sometimes the battery got explode.

Water level should be maintained in wet-cell batteries. If the level of water is low, then refill them with distilled water. However, if the water is dried for a long time then it would be a problem. Sulfation is build up when the plates of cell got exposed to oxygen. Sulfation is the number 1 cause of the primary failure of battery.

The dark or brownish fluid in the battery also indicates the bad health of the battery. It is time to replace your battery.

2. Take Voltage Reading

To determine the charging state, voltage of a battery is a good way. Take a look at the different voltage and the respective condition of the battery

• 0 volts, means battery might experience a short circuit.

• Do not reach higher than 10.5 volts on charging means the cell of the battery is dead

• Fully charged determined by the battery charger but voltage is less than or equal to 12.4, battery is sulfated.


3. The Load test of the battery

A local automotive shop can load test your battery but it is easy to do it at home. You just need a digital voltmeter. The battery must be charged fully to take accurate test.

• Access the terminals of the battery by removing the seat of the motorcycle and do not disconnect the battery because you have to start the bike

• Holds prongs of the voltmeter to the terminals of the battery correctly

• Push the start button and watch where the voltage drops.


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