Mighty Max Battery ML-U1 200CCA Battery for Gravely ZT 2148 Zero Turn Radius Lawn Mower

What It Is

The Mighty Max Battery ML-U1 is a 200 cold-cranking-amp (CCA) sealed lead-acid battery designed as a drop-in replacement for the Gravely ZT 2148 zero-turn mower. It powers the starter, ignition, and any electric accessories on mowers or small engines that require a U1 group-size battery.

Fitment & Compatibility

Before buying, confirm three things:

• Dimensions: U1 group size – 7.75" L x 5.13" W x 6.25" H. Measure your battery tray to ensure it fits.
• Terminal layout: Positive terminal is on the left when facing the battery. Check your cable orientation – if your Gravely uses opposite polarity, you’ll need to reverse cables or use adapters.
• CCA rating: 200 CCA is the minimum for most ZT 2148 models. If your engine is a Kawasaki or Briggs & Stratton with higher compression, verify that 200 CCA is adequate (usually fine for stock engines).
• OEM vs aftermarket: This is an aftermarket replacement for Gravely OEM part 00046500. It’s not an exact OEM copy, so check that your hold-down bracket and terminal hardware match.

Key Things to Know

• Sealed/AGM: No maintenance, no acid spills, and can be mounted in any orientation except upside down. Good for vibration-prone mower use.
• Installation difficulty: Easy – remove old battery, clean terminals, connect positive first then negative, and secure with hold-down. Takes about 10 minutes.
• CCA vs Ah: 200 CCA is fine for starting, but if your mower sits for weeks, the amp-hour rating (~18 Ah) is modest. A trickle charger is recommended for off-season storage.
• Reviews are thin: Only 3 ratings at 3.7 stars – limited feedback. Consider buying from a seller with a clear return policy in case of dead-on-arrival or early failure.

Should You Buy It

If you need a budget-friendly, no-maintenance battery for a Gravely ZT 2148 or similar U1-equipped mower and are comfortable with basic DIY replacement, this is a reasonable option. However, given the low review count and modest CCA, it’s best for mowers used regularly (not stored all winter) and for users who can verify fitment carefully. For heavy-duty or commercial use, consider a higher-CCA or OEM battery.