Note: Not FAA Approved. Intended for use in EXPERIMENTAL AIRCRAFT ONLY.Designed for piston engines up to 550ci, max alternator output of 70 amps. If used for ONE turbine engine, you must have 2 batteries connected in parallel. Contact us prior to buying to verify the proper batteries needed for your TURBINE application, call 970.674.8884 option 3, or techsupport@earthxbatteries.com.This battery is fully protected by an integrated battery management system (BMS) that protects the cell’s from over discharge, over charge, short circuit, temperature, plus cell balancing to ensure charge levels are equal. Additionally, our ETX-Hundred Series aircraft batteries have redundant electronic circuits and battery fault indication. The fault indicator can be connected into your EFIS or wired to a 24volt LED light on your control panel to alert you to the state of charge and state of health of the battery. (Please see manual for details)Please Note: Due to shipping regulations, this battery does ship as dangerous goods outside of the 48 continental USA states.