... . Comfortab to wear; 3. Hard ageing. Semi-mask powered air respirator Manual 1 Purpose and characteristics Half-mask powered air-type ... dry, ventilated, temperature suitable place, not exposure to organic solvents. 5.2 Storage period: 3 years. Battery: voltage DC1.2V, current ... 800mA; Charger: Input voltage 100 ~ 240 V, output voltage 5.2V, current of 320mA, charging method by 3.6 requirements ...