... Tolerance 5) factory 3W/5V Portable Folding solar charger with storage lithium-polymer batteryTechnical parameters TOLERANCE(+- 0.5) ... 2 years; Product features Be with uni-solar amorphous solar cells, the panels are with many advantages that high efficiency,foldable ... , very light weight,thin film,endurable,very little influence with temperature, anti-reverse charging protection,shadow tolerance & hot ...