Mighty Max Battery AGM motorcycle battery YTX5L-BS 12V 4Ah — 80 CCA, sealed maintenance-free

The Mighty Max Battery YTX5L-BS is a sealed 12-volt, 4Ah AGM motorcycle battery that ships ready-to-install and delivers dependable starting power with 80 CCA in a compact, maintenance-free package.

This YTX5L-BS uses absorbed glass mat (AGM) sealed lead-acid technology to combine spill-proof safety with high discharge capability and vibration resistance. It arrives pre-charged and sealed, so there’s no need to add water or perform routine electrolyte checks. Designed for small motorcycles, ATVs, jet skis, snowmobiles and other powersports machines, this battery emphasizes compact size, reliable starting performance and easy installation.

How much power and physical space does this battery provide?

The YTX5L-BS is rated at 12 volts and 4 amp-hours with 80 cold cranking amps (CCA), offering sufficient cranking power for many lightweight engines and accessories. Its small footprint makes it suitable where space is tight and polarity is configured with the negative terminal on the left and positive on the right.

• Voltage: 12 V
• Capacity: 4 Ah
• Cold Cranking Amps: 80 CCA
• Dimensions: 4.40" L x 2.75" W x 4.25" H
• Polarity: Negative left, Positive right

What makes the AGM construction practical for powersports use?

AGM (absorbed glass mat) construction locks electrolyte inside glass fiber separators, making the battery spill-proof and safer to mount in non-upright positions. This design also improves vibration tolerance and allows the battery to deliver strong bursts of current for starting in a range of temperatures.

• Spill-proof, sealed design — install in any orientation
• High discharge rate for reliable starts
• Good shock and vibration resistance for off-road and marine use
• Wider operating temperature capability than standard wet cells

How easy is installation and what’s included with the battery?

The battery comes fully charged and sealed, ready for immediate installation—no acid filling or maintenance required. The listing includes the battery and mounting screws only; no wire harness or additional mounting accessories are provided, so be sure to confirm fit and connector compatibility before purchase.

• Ships pre-charged and maintenance-free
• Includes battery and screws; no harness or extra mounts
• Mount in any position thanks to AGM sealing
• One-year full warranty for manufacturing defects

How should I maintain and recharge this battery for longest life?

Although maintenance-free, regular charging when the battery is not in regular use preserves capacity and lifespan. Use an intelligent charger designed for 12V AGM batteries and avoid leaving the battery in a deeply discharged state for extended periods.

• Use an AGM-compatible, smart charger for best results
• Store charged in a cool, dry place during off-season
• Avoid prolonged deep discharges to reduce capacity loss
• Inspect terminals and connections periodically for corrosion

Who is this for: The Mighty Max YTX5L-BS suits riders and powersports owners who need a compact, ready-to-install replacement battery with reliable starting power and spill-proof convenience. It’s a practical choice for small-displacement motorcycles, scooters, ATVs, jet skis and snowmobiles that require a 12V 4Ah battery with 80 CCA, minimal upkeep and proven AGM durability.