Efficiency : 17%
Connection wiring: the blue side connect “-” , white side connect”+”.
In order to ensure enough power,You’d better to use solder strips or copper strips to connect.
Note: there may be some solar panels have a small spots on the side, please don’t worry, it’s normal and will not affect the function of the solar panels.
If mind this spots appearence, please don’t take it.
If you use it by DIY ,testing … it is very worth, factory price here .
100pcs 39*19MM solar panel for DIY solar panel DIY cell phone charging