Mighty Max Battery ML-U1 200CCA Battery for Toro Time Cutter SS4250 Zero-Turn Lawn Mower

What It Is

The Mighty Max Battery ML-U1 is a 12V, 200 Cold Cranking Amps (CCA) sealed lead-acid battery designed as a direct replacement for the OEM battery in Toro TimeCutter SS4250 zero-turn mowers and similar small-engine outdoor power equipment.

Fitment & Compatibility

Before buying, confirm your Toro TimeCutter SS4250 model year—this fits most 2014–2021 versions. Measure your existing battery tray: the ML-U1 is U1 size (approx. 7.7" L x 5.1" W x 6.1" H). It matches OEM part numbers like Toro 121-7166 or 121-7167. This is an aftermarket battery, not OEM Toro, but it meets or exceeds the 200 CCA spec required for the SS4250’s 22hp Kawasaki engine. Check terminal orientation: positive post is on the left when facing the terminals. If your mower uses a different terminal layout (e.g., U1R), this won’t fit without adapter cables.

Key Things to Know

• Quality: Sealed AGM (Absorbent Glass Mat) design—no maintenance, no acid spills, and vibration-resistant for mower use.
• Installation: Simple swap; remove old battery, clean terminals, install new one. No special tools needed beyond a 10mm wrench.
• CCA Rating: 200 CCA is sufficient for the SS4250’s engine, but if you mow in cold climates (below 32°F), consider a higher CCA battery for reliable starts.
• Common Gotcha: The battery may ship partially charged. Charge it fully before first use to avoid premature failure.

Should You Buy It

If you need a reliable, budget-friendly drop-in replacement for your Toro TimeCutter SS4250 and don’t mind an aftermarket brand, this is a solid choice. It’s best for owners who want a simple swap without paying Toro’s OEM premium. Avoid if you require OEM-only parts for warranty reasons or need a higher CCA for cold-weather starting.