Informational Guide

How Many Amps Is A Motorcycle Battery?

In this guide, we help you understand amperage and answer how many amps a motorcycle battery is.

Without a properly functioning motorcycle battery, it would be difficult to start and run your bike. To fully understand the ins and outs of your bike, you should know how this battery works.

For example, do you know how many amps is a motorcycle battery? If not, this guide will help you understand motorcycle battery amps and show you why you might need a new motorcycle battery.

How many amps is a 12v motorcycle battery? All batteries offer different amp ratings, but it’s important to know what this is before you attempt to charge it. If you recharge a motorcycle battery at the wrong level, you could overcharge it and cause it to fail prematurely.  

In most cases, you want to charge a motorcycle battery at one-tenth of the rating in amp hours. For example, if you have a 12 volt 14 amp motorcycle battery, you want a charger that produces 1.5 amps.

In this case, how long to charge a motorcycle battery at 1.5 amps? To get it to 14 amps, you will need to charge it for ten hours. Using a trickle charger will help you achieve the appropriate charge in this situation.  

With your 14 amp battery, the 12 volt 1 amp motorcycle battery charger might cause the charging to take a little longer, while the 12 volt 6 amp motorcycle battery charger might be too powerful. To help you determine the motorcycle battery amp hours, you want to understand both of the terms below.  

Cold Cranking Amps 

The Cold Cranking Amps (CCA) describes how many amps the battery offers when operating at 0-degrees Fahrenheit for thirty seconds. During this time, the battery voltage level must remain at proper levels to keep working correctly.

Some batteries contain an indicator that shows when it is facing a larger load at lower temperatures. How many cold cranking amps are in a motorcycle battery? The higher the CCA of the battery, the faster it will start in cold climates.  

Battery Amp Hour Rating 

The amp hour rating of a battery shows how long it will last if it is subject to a fixed discharge rate. Smaller batteries are calculated by a ten-hour interval of discharge. If the battery has an 18 amp-hour rating, it means that it can discharge 1.8 amps over ten hours. A high amp motorcycle battery combined with CCA shows you that it is ready for performance in most conditions.  

motorcycle battery

How Many Amps Does It Take To Start A Motorcycle? 

How many amps is a motorcycle battery and will it start the engine? The battery you need depends on several factors. First, you must look at the condition and size of the engine. You also need to know how much juice is required to operate the starting components of the bike. 

How many amps is a 12v motorcycle battery? You can find a variety of amp sizes with the 12v batteries. However, most 12-volt motorcycle batteries will need at least 200 amps to start a modern bike.  

How To Measure Motorcycle Battery Amps 

If you want to know how many amps to charge a motorcycle battery, you must first measure the amperage. While most people are versed in checking voltage, measuring the high cranking amp motorcycle battery is a different story. 

  1. 1
    Read the label on the battery to find out the Ah rating. 
  2. 2
    Turn on a multimeter (voltmeter) and set it to Ah. 
  3. 3
    Connect the multimeter clip from the black wire to the negative battery terminal.  
  4. 4
    Connect the other multimeter clips from the red wire to the positive battery terminal. 
  5. 5
    Read what’s on the display. If the battery is charged, it should match what you have on the label. Otherwise, you can work out the percentage of the charge to see what’s remaining.  
red multimeter

People Also Ask (FAQs)

How long does it take to charge a motorcycle battery at 1.5 amps? 

Depending on how many amps need to be charged, it could take anywhere from a couple of hours to a full day. Divide the number of amps left to charge by 1.5 to find out how long it will take.  

How long does it take to charge a motorcycle battery at 10 amps? 

It depends on how many amps are in a motorcycle battery. If you have a smaller battery, charging at ten amps won’t take much time at all, but you don’t want to charge it too quickly.  

How many amps does a Harley Davidson battery have? 

The lineup of Harley Davidson bikes can have a varying number of amps in the batteries. To find how many amps your battery has, look at the label on its side to see what model it is.  

How often should I trickle charge a motorcycle battery? 

If you don’t ride your motorcycle every week, you will want to hook it up to a trickle charger. Choose one with a maintenance mode that will stop charging automatically when the battery is full.  

How long should I let my motorcycle battery charge? 

You don't want to overcharge the motorcycle battery, or you could reduce its life. Instead, opt for a battery charger that shuts off automatically when it is full, or keep a close eye on the charge.  


What amp do you charge a motorcycle battery? It depends on the capacity and the motorcycle battery cranking amps of your particular model. With a high-quality battery charger, you can hook it up and let it go because it will stop charging when the capacity is full.