We don’t measure the battery capacity by time, but rather by volume of warmed blood / fluids. In battery mode, the Warrior Hybrid battery warms up to 3.5 liters of cold fluids/blood and 5 liters of room temperature fluids. The system is optimized for the high-flow and low-input-temperature range. We don’t measure the battery capacity by time, but rather by volume of warmed blood / fluids. In battery mode, the Warrior Hybrid battery warms up to 3.5 liters of cold fluids/blood and 5 liters of room temperature fluids. The system is optimized for the high-flow and low-input-temperature range.