Best Batteries for a Harley Davidson: 2025 Edition
For most of us, the battery is one of the last things we think about until it fails to start our Harley Davidson motorcycle. Sometimes, the issue is apparent by a weak start, or it comes suddenly with the sound of our starter clicking.
Either way, when this happens, we often will look for our Harley Davidson battery tender to solve the problem. A battery tender might solve the problem if the battery is relatively new. However, it may be time to get a replacement Harley Davidson battery if it is older. So, in 2025, who will you turn to for the best Harley Davidson battery?
Replacement Harley Davidson AGM Batteries
At BatteryStuff.com, our Scorpion Battery line carries the best Harley Davidson batteries designed to replace the OEM lead acid battery. These Scorpion batteries offer high cranking, are non-spillable, factory-sealed, and come with OEM-style terminals.
Like all Scorpion AGM batteries, they have a one-year replacement warranty for manufacturer defects! Yes, you heard us right! It is a replacement warranty, not pro-rated like many of our competitors!
You can cross-reference the correct Harley Battery in the table below. Or, better yet, use our Battery Finder to pull up the proper battery for your year, make, and model Harley Davidson:
Search by Dimensions: Battery Size Chart
| Harley Part# | Scorpion Part# | Approximate Dimensions | CCA | Polarity | Image | ||
|---|---|---|---|---|---|---|---|
| Length | Width | Height | |||||
| 6607-84 (YHD-12) | hYIX28L | 8" + 1.5" at terminals | 5.13" | 6.5" | 370 |  |
 |
| 66010-97A (B or C) | hYIX30HL | 6.57" | 5.0" | 6.88" | 450 |  |
 |
| 66010-82B | hYTX24HL | 8.13" | 3.57" | 6.38" | 380 | |
 |
| 65989-97A (B, C, or D) | hYTX20DHL | 6.88" | 3.44" | 6.13" | 320 | |
 |
| 65991-82B | hYTX16BH | 6.88" | 4.0" | 6.13" | 325 | |
 |
| 65958-04A (B & C) | hYTX14HL | 6.0" | 3.43" | 5.75" | 240 | |
 |
| 65948-00 | hYTX14H | 6.0" | 3.43" | 5.75" | 240 | |
 |
Harley Davidson Lithium Replacement Batteries
If you're looking for the best lithium battery for your Harley Davidson, then we have what your looking for! Lithium batteries are perfect for those needing more cranking amps. Our Scorpion Stinger and Shorai lithium lines offer high-cranking power and are BMS Protected!
The main advantage of switching to a lithium battery is its high-cranking and lightweight design. They weigh about one-third of the original battery. However, they produce much more cranking power. This is great for high-compression engines!
Lithium motorcycle batteries are a great alternative and can offer a slightly higher lifespan when cared for properly. Before making the switch, we suggest reading a couple of articles. They discuss the pros and cons of lithium technology and its starting limitations incold weather starting.
To find the best lithium Harley Davidson battery, we recommend using our Battery Finder. In some cases, Harley Davidson used the same form factor battery for different engine sizes. However, the importance of lithium battery capacity sometimes leads to an upgraded recommendation for certain models. For this reason, we recommend using our Battery Finder to find the proper lithium battery:
Search by Dimensions: Battery Size Chart
Alternatives to the Harley Style Battery
When purchasing a Harley Davidson replacement, pay extra attention that you've chosen the correct size and terminals. Some Harley models need a flush-style terminal because Harley uses a battery cable with an L-shape connector. Harley’s that have this connector generally have a battery cable that comes from below the battery. The L-shaped bracket sits on top of the terminal, requiring a flush mount connector.
Many big box distributors will sell you a battery that might ‘fit’ your Harley’s battery box. However, the box-style terminals they come with sit too far back, so the L-shape bracket doesn’t align. The battery may fit, but you cannot use it unless you can connect the cable to the battery.
These alternatives are often attractive as they can be less expensive than the Harley-style battery. Before purchasing, it is important to verify the connector coming off your Harley’s battery cable. Stick with the Harley versions above if the connector looks like an L-shaped bracket. If the connector is a ring connector, these alternatives can be budget-friendly!
| Harley Part# | Scorpion Part# | Approximate Dimensions | CCA | Polarity | Image | ||
|---|---|---|---|---|---|---|---|
| Length | Width | Height | |||||
| 66010-97A (B or C) | sYIX30L | 6.57" | 4.94" | 6.88" | 400 | |
 |
| 66010-82B | sYTX24HL | 8.13" | 3.57" | 6.38" | 350 | |
 |
| 65989-97A (B, C, or D) | sYTX20HL | 6.88" | 3.44" | 6.13" | 310 | |
 |
| 65991-82B | sYTX20H | 6.88" | 3.44" | 6.13" | 310 | |
 |
| 65948-00 | sYTX14 | 6.0" | 3.43" | 5.75" | 200 | |
 |
Most FAQs regarding the best Harley Replacement Batteries:
- How long should a Harley Davidson battery last?
- The average life span for a Harley battery is 3 to 5 years when maintained with a battery maintainer when not in use. If you live in a moderate climate, we have seen customers exceed the 5-year mark with our Scorpion Battery line.
- How many CCA does a Harley need to start?
- BatteryStuff.com recommends sticking with the manufacturer’s suggested battery size requirements. For custom applications, we recommend choosing the battery based on the bike the engine came from. If you have upgrade the engine or starter talk with the companies that performed the upgrade for their recommendation.
- What type of battery does Harley Davidson use?
- The original Harley came with a flooded battery, much like the batteries we find in our vehicles. Today’s Harley has transitioned to a sealed AGM battery, much like the Scorpion’s Harley Davidson Replacement Batteries.
- What drains the battery in a Harley Davidson when it’s not running?
- Like most modern vehicles, most bikes have a lot of electronics installed on a motorcycle. Today’s touring bikes have many features, such as GPS, security systems, and key fobs. Depending on the bike, you may have a small or large parasitic draw. We recommend using a battery maintainer to keep the battery topped off and ready to go!
If you need assistance finding the right battery or have questions that have not been answered. Feel free to call or reach out to our techs via our contact us page.
