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Sometimes a remark like “My Boyfriend Put a New Battery in My Car…It Says “Lawn and Garden” on It!” with an unbelievable image, says it all about doomed relationships, as recently shown in a Reddit’s r/Justrolledintotheshop forum discussion.

The caption summed it up perfectly:
2015 Toyota Corolla—It works, but I bet it fails this winter, and yes, it says ‘Lawn and Garden’ on the side. I’m surprised they put the hold down back on because it’s not doing anything now.”
Not only is the battery the wrong type, underpowered, and with mismatched battery posts for the car’s battery cables, it is also dangerously secured to the engine bay.
That raises a real question many drivers are curious about: Can you use a lawn mower battery in a car?
Related article: The $20 Car Battery Tester Will Save You Over $200
Why a Lawn Mower Battery Will Sometimes Work
Several Redditors admitted they had done the same thing out of desperation.
I’ve been broke as hell before and had a ’98 Taurus I drove with a Walmart lawnmower battery for over a year before I finally ditched the car.” – mlw35405
I ran one of my cars with a mower battery for quite a while. Just don’t ever leave the lights on—it has no capacity.” – hydrogen18
So yes—it’s possible to start a car with a mower battery, but that doesn’t make it safe or reliable.
Here’s why:
The Drill Battery Hack—Even Riskier
Some DIYers point to YouTube videos showing people jump-starting a car with a drill battery, like a 20V DeWalt lithium-ion pack. But that’s a dangerous hack.
Here’s the problem:
When (and How) to Use a Lawn Mower Battery Safely
If you’re stranded and a mower battery is the only option, you can use it as a temporary emergency jump source—but never as a permanent replacement. Here’s the safer method:
Final Thoughts About This Hack
Yes, a riding lawn mower battery for a car can sometimes get your engine to start, especially in warm weather. But it’s underpowered, unsafe if not secured, and risks damaging both the battery and your vehicle.
If you’re driving a 2015 Toyota Corolla (or any modern car), spend the extra money on the right battery—or at least keep a portable jump starter in your trunk. It’s cheaper than repairing fire damage or replacing fried electronics.
Your Turn: Have you ever tried using a lawn mower battery or drill battery to start a car? Did it actually work? Share your experience in the comments!
For additional useful information about your car’s battery, here are a few articles for your enjoyment and automotive education:
Timothy Boyer is an automotive reporter based in Cincinnati who currently researches and restores older vehicles, often incorporating engine modifications for improved performance. He also covers modern cars—including EVs—with a focus on DIY mechanics, tool use and selection, and other topics related to automotive repair. Follow Tim on Twitter (@TimBoyerWrites) and Facebook for daily updates and insights on new and used cars and trucks.
Image Source: Deposit Photos
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