Mighty Max Battery Y50-N18L-A3 12V Motorcycle/ATV AGM Battery — 21AH, 350CCA, Maintenance-Free

The Mighty Max Battery Y50-N18L-A3 is a sealed 12V AGM lead-acid battery delivering 21 AH and 350 CCA in a maintenance‑free, ready‑to‑install package.

This compact, rechargeable SLA/AGM battery is built for powersports and small vehicle applications that need reliable starting power and deep‑cycle resilience. It ships charged and sealed, so you can fit it into motorcycles, ATVs, jet skis, snowmobiles, or personal watercraft without topping off fluids. Its absorbed glass mat construction offers improved vibration resistance and broad temperature tolerance compared with conventional flooded batteries.

How much starting power and capacity does this battery provide?

The Y50-N18L-A3 supplies 12 volts with a nominal capacity of 21 ampere‑hours and a cold cranking rating of 350 CCA, giving a good balance of reserve energy and reliable starts in moderate cold. That CCA rating helps turn over small engines quickly, while the 21 AH capacity supports accessories and repeated starts between charges.

• Voltage: 12 V nominal suitable for most motorcycles and ATVs
• Capacity: 21 AH for sustained accessory use and reserve power
• Cold Cranking Amps: 350 CCA for dependable engine starts

Can I mount or service this battery easily in my vehicle?

Yes — the sealed AGM design is maintenance‑free and can be installed in virtually any orientation without leaking. It resists shocks and vibration so it stays secure in active off‑road and marine environments. The battery ships with the terminals and screws needed for connection; no separate acid handling or regular water refills are required.

• Sealed AGM construction — no topping off or acid exposure
• Mounting: can be installed in any position safely
• Included: battery and terminal screws; no harnesses or mounting brackets

What are the physical dimensions and terminal layout?

The compact case fits many small vehicle battery trays: 7.94 inches long, 3.44 inches wide, and 6.19 inches tall. Terminal polarity places the negative terminal on the left and the positive terminal on the right when facing the terminals, which matches common motorcycle and powersports configurations.

• Dimensions: 7.94" L × 3.44" W × 6.19" H for easy tray compatibility
• Polarity: negative terminal on left, positive on right (as viewed at terminals)
• Weight and tray fit: compact design for snug installations

How durable is the battery under heavy use and varying temperatures?

Mighty Max’s AGM technology is engineered for higher discharge rates, wide operating temperature ranges, and recovery after deep discharge events. It tolerates vibration and frequent engine starts better than standard flooded cells, making it suitable for trail, marine, and winter use when conditions are rough.

• High discharge capability for frequent starts and accessory draw
• Improved vibration resistance for off‑road and marine environments
• Performs across a broad temperature range for seasonal use

Who is this for: Riders and owners of small engine vehicles who want a compact, maintenance‑free battery that balances strong starting power with usable reserve capacity. If you operate motorcycles, ATVs, snowmobiles, jet skis, or personal watercraft and prefer an AGM battery that arrives charged and ready to install, the Mighty Max Y50-N18L-A3 is built for that purpose. It also includes a one‑year warranty that supports everyday recreational and commuting needs.