The ETX Hundred series are designed specifically for your aircraft starter or backup battery needs. Our lithium airplane batteries are proudly used by many aircraft and helicopter manufacturers, including Vans Aircraft. They are tested and used by many engine companies, such as Rotax, Continental, Lycoming, and UL Power. You will instantly remove 11+ pounds compared to a lead acid battery, as well as see a significant increase in cranking power. EarthX batteries have a sophisticated BMS designed with redundancy for safety, reliability, and performance.