Mighty Max Battery ML-U1 200CCA Battery for Simplicity Regent 17H Hydrostatic Lawn Mower

What It Is

The Mighty Max Battery ML-U1 is a 12V, 200 CCA (Cold Cranking Amps) replacement battery designed to start and power the electrical system on a Simplicity Regent 17H hydrostatic lawn mower. It’s an aftermarket drop-in substitute for the OEM battery, intended for gas-powered riding mowers with similar specs.

Fitment & Compatibility

Before buying, confirm these three things:

• Mower model: This battery is specifically listed for the Simplicity Regent 17H (hydrostatic). It may also fit other Regent models with the same engine and battery tray size, but verify your model number (e.g., 2690675, 2690676) on the mower’s serial tag.
• Dimensions: The ML-U1 measures approximately 7.7” L x 5.1” W x 6.3” H. Measure your current battery tray to ensure it fits—tight spaces may require a smaller battery.
• Terminal orientation: It uses standard SAE posts (positive on right, negative on left when facing the terminals). Check your cable routing—if your mower has side terminals or a reversed layout, this won’t work without adapter cables.
• OEM part cross-reference: This replaces Simplicity OEM battery part numbers 1720711SM, 1720712SM, and 1735569SM. If your mower uses a different OEM battery, double-check the CCA and dimensions match.

Key Things to Know

• CCA rating: 200 CCA is sufficient for most Regent 17H engines (typically a 17-20 HP Briggs & Stratton), but if you mow in cold climates (below 30°F), consider a battery with 250+ CCA for reliable cold starts.
• Installation difficulty: Easy—no special tools needed. Disconnect negative first, swap cables (positive to red, negative to black), and tighten. Expect 15-20 minutes.
• Common gotchas: The battery is shipped dry (no acid). You’ll need to fill it with the included electrolyte, wait 30 minutes, then charge it before first use. Skipping the initial charge can damage the battery.
• Quality: Mighty Max is a budget brand. It works for light-to-moderate use, but may have a shorter lifespan (2-3 years) compared to premium brands like Yuasa or Exide in heavy-use mowers.

Should You Buy It

If you need a quick, affordable replacement for your Simplicity Regent 17H and don’t mind a little DIY setup (filling and charging), this battery fits the bill. It’s not built for extreme cold or heavy commercial use, but for residential mowing in moderate climates, it’s a solid value at $59.99.