Features Green, environmental friendly (Can be charged by solar) It adopts environment friendly lithium-ion polymer with high quality, with capacity of 2000mAh, possess both rechargeable battery and back-up battery functions. Press test switch to check remaining capacity. Suitable for products with voltage of DC 5 V±0.5V and current of ≤500mAh. Provide power for various digital products which have USB charging function by different connectors: Mobile Phone, IPOD, PSP, MP3 player, MP4 player, PMP, GPS, Bluetooth, digital camera, etc. Super long lifespan, after 500 cycles of charge and discharge circle, the capacity remains more than 80%. Smart protection chip: over charging protection, over-discharge protection, overload protection, short circuit protection and capacity indication. It is convenient to charge your digital products at anytime and anywhere. With LED lighting function. Elegant appearance, lightweight, convenient to carry. Main Parameters: ItemSpecification Dimension116mm*48.4mm*25.7mm Weight126.4g Capacity2000mAh Rated Input VoltageDC 5.0 -- 6.0V Rated Output VoltageDC5.3 5.6V Fully charged time by adaptor≤5hr Cycle life≥500 cycles (after 500 cycles,the capacity remains more than 80%). Lighting time after 1 hour Charging under sunlight(500W/ M2 ) ≥100min Max. Current flux of being charged by solar(500W/ M2 )150mA Time of being fully charged under sunlight(500W/ M2 )38 48hr Max. Luminous flux3 5LM AccessoriesUsers Manual, Connection cable, connectors, charger Solar Charger(Emergency Charger,Travel Charger) Portable Charger