Mighty Max Battery YTX20L-BS REPLACEMENT FOR HARLEY DAVIDSON FXD, FXST SERIES (DYNA) brand product YTX20L-BS is a 12V 18AH 270 Cold Cranking Amps (CCA) Sealed Lead Acid (SLA) Battery Dimensions: 6.88 inches x 3.42 inches x 6.10 inches. Polarity: Negative on left, Positive on right. Listing is for the Battery and Screws only. No wire harness or mounting accessories included. 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. Backed by a 30 day refund policy and full 1 year warranty.