Highlights: Detachable Solar panels: you can install one panel or two panels to charge the lithium battery; Also, the battery can be taken out & used in other applications Indication: charging & discharging state Protection: reverse current protection integrated circuit to prevent batteries from being discharged or charged Compatible with Apple iPhone 4, iPhone 2G/3G/3GS, & most of the other cell phones, such as Nokia, Black Berry, Samsung, HTC, Motorola, Sony Ericsson, iPods, PDA, PSP, MP3/MP4 Specification: Dimensions: 12.2 x 6.2 x 1.2 cm Weight: 116g Solar Panel (Poly-crystalline):5.5V/120m A USB (Universal Serial Bus) charging cable: 5V/500m A Built-in Li-ion rechargeable battery: 3.7V/1000m Ah Output volt/current: 5V/500m A Super long standby time, current consumption lt;150u A Charging time: Mobile phone: 2-3 hours Built-in Lithium battery: 10-20 hours (depends on sunlight conditions) Built-in Lithium battery: 3-4 hours (use USB (Universal Serial Bus) charging cable) Constant Volts: 4.2 volts Package Contents:1xsolar charger 1x DC Out charging cable 1x DC In charging cable 5xcharge connectors (Apple 30pin, Nokia Mini, Mini USB (Universal Serial Bus) etc)1x English user