YTX20L-BS is a 12-Volt 18 Ah 270 Cold Cranking Amps (CCA) Sealed Lead Acid (SLA) battery. 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. Premium quality Absorbed Glass Mat technology (AGM) is ideal for ATVs, Motorcycles, Personal Watercraft, Jet Ski's, Snowmobiles and more. SLA/AGM spill proof battery has a characteristic of high discharge rate, wide operating temperatures, long service life and deep discharge recover. Rechargeable battery that can be mounted in any position, resists shocks and vibration, long-lasting high performance in high and low temperatures. Polarity: negative on left, positive on right, listing is for the battery and screws only, no wire harness or mounting accessories included.