EOTech has announced the new 518 holographic weapon site. The EOTech 518 advances on the already very popular EOTech 512. The 518 uses AA batteries – alkaline or lithium – and has a QD attachment for Picatinny rails. Two Alkaline AA batteries power the 518 for around 600 continuous hours, while two lithium AA batteries will keep the 518 running for as long as 1,000 hours. The use of AA batteries should help reduce operational costs.