Mighty Max Battery ML-U1 200CCA Battery for Toro Time Cutter 19.52 Z Zero-Turn Lawnmower

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 factory battery in zero-turn mowers like the Toro Time Cutter 19.52 Z. It powers the starter and provides electrical current for safety switches, blade engagement, and headlights (if equipped). This is an aftermarket alternative to OEM battery part numbers 121-3926, 121-3926-03, or 121-3926-04.

Fitment & Compatibility

Before buying, verify three things:

1. Model number – The Toro Time Cutter 19.52 Z (model 74622 or 74623) uses this U1 size. Other Time Cutter models (e.g., 42-inch or 50-inch deck) may take a U1 as well, but confirm your specific model number on the mower’s ID tag.
2. Physical dimensions – The ML-U1 measures 7.7 x 5.2 x 6.2 inches. Measure your current battery tray to ensure it fits. The terminal layout (left positive, right negative when facing the terminals) must match your cable routing.
3. CCA requirement – 200 CCA is sufficient for most residential zero-turn engines (Kohler 7000 series, Briggs & Stratton). If your mower has a larger engine or you mow in cold climates, a higher CCA (250+) may be needed for reliable starts.

Key Things to Know

• Sealed (AGM) vs. flooded – The ML-U1 is AGM, meaning it won’t leak and can be mounted in any position. No maintenance (no water refill) is needed.
• Installation difficulty – Simple: disconnect negative terminal first, then positive. Remove hold-down bracket, swap battery, reconnect positive then negative. No programming required.
• Common gotcha – The battery arrives partially charged. Charge it fully (12.6–12.8V) before first use, or it may not crank the engine. Use a 1–2 amp charger for 4–6 hours.
• Warranty – Mighty Max offers a 1-year warranty, but read the fine print: it often requires proof of purchase and may not cover cold-weather failures or improper charging.

Should You Buy It

If you need a reliable, low-maintenance replacement for your Toro Time Cutter’s factory battery and want to save roughly 40% over OEM, the Mighty Max ML-U1 is a solid choice. It’s best for residential users in moderate climates who can charge the battery before installation. If you mow commercially, need a higher CCA for cold starts, or want a longer warranty, consider a premium option like a Yuasa or Duracell U1 battery.