... charger and back-up battery. This unit can charge various digital products via different connectors, such as: MP3 player, MP4 ... 5V and current of ≤500mA.4. It can charge various digital products via different connectors, such as: FOMA phone, AU phone ... travel, camping, emergency, promotion gift, advertising gift, eco-friendly products, outdoor, novel gift, business gift or other usaege.Main Technical ...