Motorcycle Battery Voltage Range

If it reads below those values then your battery is not keeping a full charge.

Motorcycle battery voltage range.

Place the voltmeter leads to the battery terminals. The full range of the battery is from just over 14 volts when being charged by the bike running at high rpms down to 10 5 volts under heavy load for example when the lights are on and the bike is being started. If the battery begins to hold and then steadily drops in voltage there is a problem. Fully charged our redtops including 34m bluetop will read approximately 12 6 12 8 volts and our yellowtops will read approximately 13 0 13 2 volts including bluetops with light gray cases.

No 12 volt battery will remain at over 14 volts for more than seconds unless it s being charged. If the voltage instantly drops to 0 volts that is also a problem. A battery is at a discharge anywhere from 11 9 to way below that range. A fully charged 12 volt motorcycle battery should measure about 12 6 13 5 volts between terminals depending upon its chemistry.

Positive to positive and negative to negative. 12 volt batteries supply useful energy only through a limited range from over 14 volts when fully charged and unrested down to 10 5 volts in use under load when lights dim your motorcycle is hard to start. 5 use a multi meter and test your battery s voltage range. 12 volt motorcycle batteries supply useful energy only through a limited voltaic range from over 14 volts when fully charged and rested down to 10 5 volts in use under load this battery is noticed when lights dim or your motorcycle is hard to start.

Here is a quick breakdown on the spectrum of voltage ranges. When any 12 volt battery is discharged below 12 4 volts sulfation begins to occur within the battery. The following table shows how battery voltage corresponds with state of charge at 80 degrees f. A 6v battery is comprised of three cells giving a total voltage across it s terminals of 3 x 2 1v 6 3 volts.

Motorbike batteries are made up from a combination of such cells connected in series to give the required voltage. A healthy 12 volt motorcycle battery should maintain a range from 9 5 10 5 volts under the load for a good 30 seconds straight. A good battery should read between 12 4 to 12 6 volts 12 6v being optimal.