Mighty Max Battery ML-U1 200CCA Battery for Gravely ZT 2352 Zero Turn Radius Lawn Mower

What It Is

The Mighty Max Battery ML-U1 is a 12-volt, 200 cold-cranking-amp (CCA) sealed lead-acid battery designed to replace the starting battery in the Gravely ZT 2352 zero-turn mower and similar U1-sized lawn tractors. It’s a maintenance-free, spill-proof AGM battery meant for seasonal starting and powering small electrical loads on mowers with gasoline engines.

Fitment & Compatibility

Before buying, confirm your mower uses a U1 group size battery (approximately 7.7” L x 5.1” W x 6.2” H). The ML-U1 is a direct-fit replacement for the Gravely ZT 2352 (OEM part often 00035700 or similar), but also fits many other zero-turn and riding mowers from Husqvarna, John Deere, and Cub Cadet that use U1 batteries. Check that your battery tray dimensions match and that the terminal orientation (positive on left, negative on right when facing the terminals) matches your cables. This battery has top-post terminals (standard automotive-style), not side posts. Measure your existing battery’s height and width to ensure it fits under the seat or hood—some mowers have tight clearance.

Key Things to Know

• CCA vs. needs: 200 CCA is adequate for most single-cylinder and small twin-cylinder mower engines in moderate climates. In cold weather (below freezing), expect reduced cranking power; you may need a higher CCA battery for reliable winter starts.
• Installation is simple: Remove the old battery, clean the terminals, and install the new one. No special tools or programming needed. Use a battery hold-down to prevent vibration damage.
• Sealed AGM advantage: No water refilling, no acid spills, and it can be mounted in any orientation (except upside down). However, it requires a compatible charger—do not use a high-amp “boost” charger, as AGM batteries can be damaged by overcharging.
• Rating caveat: 3.9 stars with only 10 reviews means limited real-world feedback. Some users report shorter lifespan (2–3 seasons) compared to premium brands, especially if the mower sits in cold storage without a tender.

Should You Buy It

If you need a budget-friendly, drop-in replacement for a Gravely ZT 2352 or other U1-equipped mower and you’re okay with average longevity (2–3 seasons), this battery works fine. It’s a good choice for light-duty use or as a spare, but if you mow commercially, in extreme cold, or want maximum lifespan, consider a higher-CCA AGM battery from a brand with more reviews.