Integrated Neah Power battery for extended, multiple Hour flight times https://d3ciwvs59ifrt8.cloudfront.net/6867dc99-e989-4019-ad0d-2b574424f2b1/558abb72-5684-4ccc-ab17-9b4f91fcf794.pdf http://www.s4worldwide.com/sentry-drone-surveillance Still there on the S4W Website....