This document describes a dual voltage GPU battery pack from Powervamp. It provides 12V and 24V outputs, with peak amps of 925 at 12V and 850 at 24V. It is designed for smaller aircraft and vehicles, suitable for piston aircraft, small turbines, and trucks or equipment up to 10L diesel or 3L gasoline. The polyethylene case allows the pack to be submerged up to 8 inches without water ingress. It includes leads, connectors, and an internal charger, with optional faster external chargers available.