Husqvarna Battery 12v 2.8ah Part # 580764901

What It Is

The Husqvarna 580764901 is a 12-volt, 2.8Ah sealed lead-acid (SLA) battery designed to power the electric starter on select Husqvarna walk-behind mowers and riding mowers. It replaces the factory battery in models that use a battery for push-button or key-start ignition, not for powering the blades or drive system.

Fitment & Compatibility

Before buying, verify your mower’s battery tray dimensions: this battery is approximately 5.9" long x 2.6" wide x 3.7" tall. It fits Husqvarna models like the LC 221A, LC 321A, LC 221AH, and select Riders (e.g., R 216T, R 216TX). Check your owner’s manual for the specific battery part number 580764901 or cross-reference by mower model. It is NOT compatible with Cub Cadet, John Deere, or other brands unless explicitly listed. If your mower uses a 12V 2.3Ah battery, this 2.8Ah upgrade will fit and work, but verify terminal orientation (positive left or right) matches your cable routing. Measure your existing battery’s height; a taller battery may not clear the plastic cover.

Key Things to Know

• Quality & lifespan: At 2.8Ah, this is a low-capacity battery. It starts the mower reliably but may need replacement every 2-3 seasons if stored discharged. The 3.7-star rating reflects occasional early failures or dead-on-arrival units.
• Installation: Simple swap—remove two bolts, disconnect cables (negative first), reverse for install. No programming required. Use a battery tender if the mower sits more than 30 days to prevent sulfation.
• Common gotchas: This is a wet SLA battery; it can leak if tipped. Never charge with a standard car charger (use a 1-amp trickle charger). Some users report terminal posts are slightly smaller than standard, requiring gentle cable-clamp adjustment.
• Aftermarket alternative: Generic 12V 2.8Ah SLA batteries cost ~$30-40 but may lack the exact terminal placement or factory fit. If you need a perfect drop-in, OEM is safer.

Should You Buy It

Buy this if you want a guaranteed fit for your Husqvarna electric-start mower and prefer OEM reliability over saving a few dollars. If you’re comfortable measuring terminals and adjusting cables, a cheaper generic SLA battery with the same dimensions will work fine. Avoid it if your mower uses a lithium-ion battery system or if you need a battery for electric drive or blade power—this is strictly for starting only.