The Inovonics BAT850 lith-ion replacement battery assembly is used in the EN5040, and EN5040-T. (Note: Per ICAO regulations, Inovonics will ship all BAT850 orders with the replacement batteries at less than a 30% state of charge (SoC), maximum per-order quantity of 8 BAT850s by air cargo, and 500 BAT850s by ground.)