YTX20L-BS is a 12V 18AH 270 Cold Cranking Amps (CCA) Sealed Lead Acid (SLA) Battery Dimensions: 6.88 inches x 3.50 inches x 6.13 inches. Polarity: Negative on left, Positive on right. Listing is for the Battery and Screws only. No wire harness or mounting accessories included. Weatherproof Reliability: In rain, snow, or heat, this battery powers through. Built for Performance: Handles heavy-duty electrical loads without breaking a sweat. Consistent Power Output: Handles demanding electrical loads without a hitch. Rechargeable battery that can be mounted in any position, resists shocks and vibration. Maintenance free and sealed design. Full One Year Warranty This YTX20L-BS is a sealed lead-acid (SLA) absorbed glass mat (AGM) rechargeable battery. AGM and GEL batteries are lead-acid and of the same battery chemistry. This battery comes already charged, sealed, maintenance free, and ready to install.