Technical data Input voltage: 0.7A RMS max., discharge Battery: 5 mA max. (without input current), reverse voltage: 14.4V or 14.7V target, charging current: 4.0A or 0.8A target, hum voltage: 150mV max., battery type: 12V, lead acid battery, 1.2Ah-120Ah, protection class: IP65 - noise 50dB SPL (measured at 0.5m distance)