Here Are The Best Battery for Harley Sportster

Best Battery for Harley Sportster

Choosing the best battery can be tricky to say the least. With all the different types of batteries currently on the market, finding one which will suit your needs is no easy task. The amount of choice can be overwhelming, but as with everything, the right knowledge can help you make the correct choice. This article aims to help you find the best car batteries for your Harley Sportster, but most of them can be used in other applications as well. We’ve gathered three of the best batteries as well as compiled a buying guide for your convenience. Without further to do, let’s get right into it.


  1. HDX20L – Harley Davidson Replacement Motorcycle Battery

HDX30L harley davidson replacement battery reviewThrottleX Batteries designs and manufactures their products entirely in the U.S.A., and their latest HDX20L is no exception.

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It’s currently one of the best batteries on the market thanks to several amazing features. So by purchasing it not only will you be getting a superb battery for your Harley, but you’ll be supporting the country’s manufacturers and their products directly. It’s a win-win scenario. You get a quality product and in return help brands like ThrottleX continue perfecting their batteries.


What we like:

  • Maintenance
  • Quality
  • Value
  • Warranty

The battery is completely maintenance free and it comes fully charged. All that’s left is for you to install it. The best part is that it’s an OEM-like battery, i.e. it boasts the same levels of quality and power as the original battery the bike came with. The Absorbed Glass Mat (AGM) body means the acid inside will never spill and it comes with a really neat heat sealed cover and patented solid lead female threaded terminals. As always, you get a 30-day money back guarantee but what sets this battery apart is the fact you get an additional 18-month free replacement warranty if there’s anything wrong with your unit. Factor in the price and you have a truly unbeatable product.

What we don’t like:

  • Fitment

Make no mistake, it will fit a Harley Sportster just fine, but users of other bike models have reported some issues when trying to install it. Nothing major, just a heads up if you don’t own a Harley Speedster. Check with the seller and ask whether it will fit.


  1. Harley XL 1200 Sportster 500cca Lighting Start

powersource harley Xl 1200 reviewPowerSource, the XL 1200’s manufacturer, isn’t a popular brand, but they’ve definitely got an amazing product on their hands with this battery.

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It’s definitely not as good as the ThrottleX offering, but it’s cutting it extremely close. It’s got a lot of things going for it, but at the same time, it’s not as reliable as it should be.

Things we like:

  • Size
  • Design
  • Fitment
  • Power

It’s no larger than its nearest rival, which is definitely good, and the design is alright. The black/red color combination makes it stand out visually at least, but that’s about it. Fitment is good as it will fit most Harley Sportsters, starting from 1997 going all the way to 2003. It’s got plenty of juice to start up a large bike such as the Sportster, which given its relatively compact size, is an amazing feat. It’s priced competitively, but at the segment it’s competing at, it has to offer more than just that.

Things we don’t like:

  • Value
  • Reliability

At the price point they’re offering it, the XL 1200 is a considerably worse proposition compared to the ThrottleX battery. It’s not as good in nearly every aspect bar power. Although it should last you quite a long time, customers have reported it lasting only a couple of months on end before the battery going completely flat. It’s not a bad battery, but there are definitely tons of better options out there.


  1. EarthX ETX36E Lithium Battery Harley Davidson

Earthx lithium battery reviewIf money is no object, then this is the right battery for you.

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Forget everything else out there, the ETX36E is the ultimate battery. It’s the Ferrari of the battery world. EarthX is a well-known manufacturer of high-quality batteries, and they haven’t let us down with the ETX36E.

What we like:

  • Build Quality
  • Features
  • Power
  • Size

With 13.2V 12.4 Amps of power, its one of the most powerful batteries out there. Given its compact dimensions, to say it packs an awful lot of punch for its size would be an understatement. It offers over discharge protection, over charge protection and it comes with built-in cell balancing technology. The 2-year full coverage warranty is excellent, but we doubt you’ll have any issues given the brand’s stellar reliability reputation.

What we don’t like:

  • Price

At over three times the cost of the other batteries in this list, it is mind-blowingly expensive. That said, it is three times as reliable and less likely to fail. If you have the money and don’t want the headaches of replacing batteries every year or so, the EarthX is right up your alley.


Motorcycle Battery Buying Guide

There are a couple of things you have to look out for when purchasing a battery. For starters, it needs to have a decent warranty. Good reserve capacity is a must and so are is an ample amount of cold-cranking amps. Longevity scores highly on the want list as well, right up there with the maintenance-free design. A carrying handle is nice but not a must.


If you want the best affordable battery, the ThrottleX HDX20L is a no-brainer. The XL 1200 is nice if you can’t get the HDX20L, but the best battery by a mile is the ETX36E. It is the most expensive, but in our book, completely worth it.

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