... without sunlight, can pass the city electric ( AC100V-240V ) to the built-in lithium battery charging, suitable for business, travel ... built-in lithium battery charging method1: electric ( AC100V-240V ) to the built-in lithium battery charging, LED lights green, about ... camera, MP3/MP4 and other digital products charger. Charging connection to be solar chargers and mobile phone .MP3/MP4 or digital ...