The all new ETX900-VNT designed for in cabin installations! This battery is based on the ETX900 design with the same cranking, capacity and electronic protections (BMS) but also has the addition of built in thermal runaway containment and venting for in cabin installation with 2 venting tubes that are 3 feet in length each. It is 5.4 pounds and can be used in an aircraft that has an alternator/generator with 80 amps output or less and smaller than 550ci. The ETX900-VNT meets all of the DO-347 lithium battery use in aircraft testing requirements. This is not a PMA part number. This battery also comes with an LED battery fault light indicator on the battery itself plus it can be programed into your EFIS or wired to your control panel of your aircraft with a simple 12V LED light that alerts you to the state of charge and state of health of the battery. (Please see manual for details) The battery management system (BMS) protects the cells from: over discharge over charge short circuit excessive cranking cell balancing technology PLUS these protections are redundant for another layer of protection. EarthX is proud to be one of the most trusted brands in the experimental aircraft market.