Reliable Power Source: 12V 4Ah sealed lead-acid battery with 50 Cold Cranking Amps (CCA), designed to deliver dependable power to ATVs, motorcycles, and scooters. Dimensions: 4.44 inches x 2.75 inches x 3.34 inches. Versatile Compatibility: Can replace YTX4L-BS, YT4L-12, and similar batteries, ensuring seamless installation for various power sport vehicles. Durable Construction: Shock-resistant and vibration-proof, this rechargeable battery can be installed in any position and performs reliably in both hot and cold temperatures. Long-Lasting Performance: Designed for extended use, offering consistent performance throughout its lifecycle, reducing the need for frequent replacements. Customer Assurance: Backed by a reliable 1-year coverage, offering confidence in the battery's performance and longevity. Terminal polarity is [- +], please ensure compatibility with your vehicle before purchasing. The ExpertPower YTX4L-BS is a maintenance-free, spill-proof AGM battery designed for compatible 12V large-displacement powersports replacements. It measures 4.45"L x 2.76"W x 3.39H", features 120 CCA for reliable cold-weather cranking, and is engineered with low internal resistance and high vibration/impact tolerance, featuring a Left-Hand Positive [- +] polarity layout with heavy-duty 2-Way Nut & Bolt terminal connections. This battery commonly replaces compatible 12V 4Ah powersports AGM batteries when voltage, dimensions, polarity, and terminal type match. Cross references include YT4L-BS, CT4L-BS, GT4L-BS, PTX4L-BS, Everstart ES4LBS, FTX4L-BS, ENTX4L-BS, and MBTX4U. Best applications include compatible NB50 Aero, NCH50 Metropolitan, NQ50 Spree, Elite series (SA50, SE50), Gyro S, CRF110F, CRF125F, Grom (MSX125), ZB50, TTR125E/LE, CY50 Riva Jog, KLX110/L, Z125 PRO, EXC and SX-F racing 4-stroke models, ATVs and quads like Arctic Cat 90, Can-Am (BRP) DS50/DS70/DS90, E-Ton youth models, and Polaris Sportsman/Scrambler youth. Not all powersports vehicles use the same battery size or terminal style. This factory-activated battery is ready for use, but top-charging before first use with a compatible 12V SLA/AGM smart charger rated 0.4A - 0.8A is recommended; do not exceed 1A. Automotive chargers, jump starters, and lithium chargers are not recommended. Lifespan varies by vehicle load, charging system, temperature, and storage. For seasonal vehicles, store in a climate-controlled area and recharge every 2-3 months when sitting idle. For powersports use, confirm correct polarity, ensure secure terminal connections using the included hardware to resist off-road vibration, and verify adequate cable slack. Some vehicle models may require a fitment check or system reset after battery replacement. Before ordering, compare your original battery’s voltage, dimensions, NB terminal type, polarity, capacity/CCA requirement, and wiring or compartment setup.