Model 1: Battery capacity: 6000mah Lamp head size: 380 * 130mm Solar panel size: 350 * 240mm Charging time: 4-6 hours Usage time: 6-7 hours Model 2 (recommended): Battery capacity: 4000mah Lamp head size: 380 * 130mm Solar panel size: 270 * 180mm Charging time: 4-6 hours Usage time: 4-6 hours