... , powerful, bright and high efficiency solar powered flashlight2 -Built in rechargeable lithium battery, no need to use additional battery.3 ... or hand crank using the handle, good guide your way in the dark when you do sports outside or in emergency condition.SpecificationsLithium battery ... Turn/second), three LED lights continuefor about 7 minutes. Color: red ,yellow, blue, grenn, pink, black ...ect.