Mighty Max Battery ML-U1-CCAHR 12V 320CCA Battery for Toro Titan ZX5020 0Turn Lawn Mower

What It Is

The Mighty Max Battery ML-U1-CCAHR is a 12-volt, 320 cold cranking amp (CCA) sealed lead-acid battery designed to replace the OEM battery in Toro Titan ZX5020 zero-turn mowers and similar riding lawn equipment. It provides starting power for the engine and runs electrical accessories like lights and the PTO clutch.

Fitment & Compatibility

Before buying, verify these three things:

• Model match: The Toro Titan ZX5020 uses a U1-sized battery group. This Mighty Max fits that form factor (roughly 7.7" L x 5.1" W x 6.2" H). Measure your existing battery tray to confirm clearance.
• Terminal orientation: The ML-U1-CCAHR has positive on the left, negative on the right when facing the terminals. Check your mower’s cable routing—if your OEM battery has reversed polarity, this won’t work without extending cables.
• OEM vs. aftermarket: This is an aftermarket replacement, not a Toro-branded battery. It’s a direct fit for the ZX5020 and many other Toro, John Deere, and Cub Cadet zero-turns that use a U1 battery. Confirm your mower’s battery group (U1) before purchase.

Key Things to Know

• Quality: Mighty Max is a budget-friendly brand. The 320 CCA is adequate for most residential zero-turn engines (typically 22-27 HP), but may struggle in extreme cold or with high-compression engines. Expect 2-4 years of life with proper care.
• Installation: Easy—disconnect negative first, remove hold-down, swap cables (positive to red, negative to black), and secure. No special tools needed. The battery is sealed (AGM), so no water refill required.
• Common gotchas: The terminal posts are smaller than some OEM batteries (standard SAE posts). If your cables have large clamps, you may need adapter shims. Also, this battery is shipped partially charged—fully charge it before first use to maximize lifespan.
• Warranty: Typically 1-year replacement, but Mighty Max’s customer service is limited. Keep your receipt.

Should You Buy It

If you need a quick, cheap replacement for your Toro Titan ZX5020 and don’t mow in sub-freezing temperatures or run heavy electrical accessories, this battery gets the job done. It’s a solid value for the price, but if you want longer life or higher CCA for cold starts, spend more on a premium brand like Yuasa or Interstate.