NFL's Zach Sieler uses Extreme Kartz & Bolt Energy for his Golf Cart Lithium Battery kit
When it comes to powering performance—on the field or on the road—reliability matters. Just ask Zack Sieler, defensive tackle for the Miami Dolphins. After eight years in the NFL, Sieler knows a thing or two about endurance, strength, and efficiency. Recently, he brought that mindset to an unexpected passion project: upgrading his golf cart.
From Michigan Roots to the NFL
Sieler grew up in a small Michigan town where the auto industry was part of daily life. Many of his family members worked in the field, and he even pursued a degree in mechanical engineering, earning job offers from GM before the NFL came calling.
Although football became his career, Sieler’s engineering background fueled his love for all things automotive—a passion that naturally carried over when he and his wife picked up a golf cart.
The Golf Cart Challenge
Like many cart owners, Zack’s excitement was dampened when he realized the batteries were shot. Replacement quotes from dealerships were steep, so he started researching alternatives online.
That’s when he found ExtremeKartz.com. After speaking with the team—including Ryan, Bobby, and Brent—Sieler was pointed toward Bolt Energy lithium batteries as the perfect solution.
Installing the Bolt Energy Battery
With expert guidance, Sieler tackled the install himself.
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Install Time: Roughly 3–4 hours
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Experience: Straightforward with help from the Extreme Kartz team
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Result: A smooth, powerful new life for his golf cart
Even before hitting the course, Zack could feel the difference:
“Now it’s like you step on and there’s so much more—it just wants to go. It’s fast, strong, and you can tell it’s not struggling anymore.”
Performance That Excites
The upgraded cart immediately showed off the strengths of lithium power:
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⚡ More speed and torque compared to old batteries
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🔋 Reliable power output without struggling
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🔧 Room for future upgrades, like switching to an AC motor
For someone used to performance at the highest level, the difference was clear.
Why Bolt Energy & Extreme Kartz?
Zack highlighted not just the product, but also the customer experience:
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Friendly, knowledgeable staff
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Personalized guidance on which battery to choose
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Hands-on support through the install process
In his words:
“Thanks again, Bolt. You guys were awesome. Couldn’t say enough great things about these guys.”
Final Thoughts
From Division II walk-on to NFL veteran, Zack Sieler has always valued hard work, reliability, and strength. That same mindset made his transition to Bolt Energy lithium batteries a natural choice for his golf cart.
With Extreme Kartz providing expert advice and Bolt delivering top-notch performance, his cart now has the speed, power, and dependability to match his competitive spirit.
👉 Thinking about upgrading your own cart? Check out ExtremeKartz.com and explore lithium options that can transform your ride.
⚡ Pro Tip: Just like Zack discovered, investing in a lithium upgrade doesn’t just replace your batteries—it unlocks performance you didn’t know your cart had.
