The xinpuguang 21w dual usb solar charger is made of 3pcs 7 watt solar panels produces the most power of any portable solar charger and it has unique features that make it more versatile and durable including two output ports a 3 in 1 data cable and four carabiners. Xinpuguang solar charger is also smaller and lighter than other options with similar output so it can more easily fit into a camping backpack hiking daypack or emergency kit. It can also be hung on the backpack and charged while walking.
