ExpertPower motorcycle battery YTX4L-BS 12V 4Ah AGM — 120 CCA, maintenance-free compact fit

The ExpertPower YTX4L-BS is a sealed 12V 4Ah AGM motorcycle battery designed to deliver dependable 120 CCA starting power in a compact, maintenance-free package.

If you need a small, high-capacity battery for motorcycles, scooters, ATVs, or dirt bikes, the ExpertPower YTX4L-BS combines an upgraded 4Ah energy reserve with AGM construction to resist vibration and eliminate fluid maintenance. It replaces common YTX4L, GTX4L and GT4L units, fits many small-displacement bikes and off-road machines, and is fully sealed for safe indoor or enclosed mounting.

How much starting power and runtime does this battery provide?

The battery delivers 120 Cold Cranking Amps (CCA) for ignition assistance in varied temperatures and a 4Ah rated capacity for longer runtime than typical 3Ah units. That extra amp-hour helps accessories, extended starting attempts, or slower charge recovery between rides.

• 120 CCA for reliable cold starts
• 4Ah capacity for increased energy reserve compared to 3Ah models
• 12V nominal voltage compatible with standard small vehicle electrical systems

Will the ExpertPower YTX4L-BS fit my motorcycle or ATV?

This model is a direct form-fit replacement for YTX4L, GTX4L and GT4L batteries and measures approximately 4.45" L x 2.76" W x 3.39" H. It commonly fits mini bikes, pit bikes, 50cc–100cc scooters and many 4-wheelers, but always verify physical dimensions and terminal orientation before ordering.

• Direct replacement for YTX4L/GTX4L/GT4L
• Compact dimensions: 4.45" x 2.76" x 3.39"
• Check terminal placement and mounting brackets for compatibility

What are the maintenance and safety advantages of AGM construction?

Absorbed Glass Mat (AGM) technology traps electrolyte in a glass-fiber mat so the battery is sealed and spill-proof. That makes it vibration-resistant, maintenance-free (no water refilling), and safer for storage or installation inside covered battery compartments.

• Sealed, spill-proof design for indoor or enclosed mounting
• Vibration resistance suited for off-road use
• No watering required—rechargeable and maintenance-free

How should I care for and charge this battery to maximize life?

Use a charger compatible with sealed lead-acid/AGM batteries and avoid prolonged deep discharge. Regular charging after rides and storing at a partial charge in cool conditions helps preserve capacity and extends usable life.

• Use an AGM-compatible smart charger for best results
• Avoid full discharges; recharge after ride or storage periods
• Store in a cool, dry place and check voltage periodically

Who this is for: Riders and hobbyists who require a compact, reliable battery with higher capacity than entry-level small batteries—especially owners of mini bikes, scooters, pit bikes, 50cc–100cc motorcycles, small ATVs and dirt bikes that accept YTX4L/GTX4L/GT4L replacements. It's also a good option for people who prefer a sealed, maintenance-free battery for indoor trays or vibration-prone off-road use.