Solar panel: 0.5W Inside battery: Ni-MH rechargeable battery 3.6V/1100mAhLight sources: 4pcs CFLIf charged one day via sunshine: work 2-3 hoursIf fully charged: work 10-12 hours Charge time by USB/adopter: 2 3hours could fully charge built-in batteryCharge time by sunshine: 10 standard hoursWork temperature: -10 60°CProduct size: 340 x 97 x 88mmProduct weight: 170g