Mighty Max Battery 12V 18AH SLA Replacement Battery for Alien Bees Vagabond II Brand Product ML18-12XRP SLA is a 12V 18AH Sealed Lead Acid (SLA) rechargeable maintenance free battery. Dimensions: 7.13 inches x 3.01 inches x 6.57 inches. Terminal: Internal Thread. 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.