EOTech, a division of L-3, delivers cutting edge technology and products in the fields of holographic sighting systems, tactical lasers, illuminators and thermal imaging equipment. EOTech provides high-quality battle-tested products to law enforcement and commercial markets around the world. The Replacement Battery Cap services lost or worn parts for select EOTech Holographic Weapon Sights. For AA battery models 512 and 552 manufactured prior to March 2009. This model has dog ears on the bottom front of the cap rather than flat bottomed. Not compatible with sights manufactured after March 2009.Eotech Bat