... window , car window. The Portable, fold-up design protects your solar panels when stored3.Cheerful & ... excellent low-power temperature path design, energy conversion efficiency >"92%, can up to 93.4%, the ... way run power and has 8 functional design for output up to USB (5.0V); Small USB ... , extend the service life, Has additional design of over charge, over discharge, Multiple protectionsSpecification1 ...