On June 22, 2016, ンコーーーー Co., Ltd. released a "insensitive solar charging backpack" (specific model: SOLARBK3）， The backpack is charged in the sun through a detachable solar panel on the back. The charging panel can be directly connected to the data cable to charge the smart phone. The retail price is 9800 yen (615 yuan).

Mobile phones have become a necessity for human survival, and the lack of power of mobile phones often troubles everyone. The imperceptible solar charging backpack aims to provide unlimited power output for mobile phones/tablets and other devices without knowing it, and can store power as long as there is light. It uses an efficient solar energy conversion panel, with a conversion rate of up to 22.5%. Under normal sunlight, it can provide 30%~70% power for the iPhone 6 within three hours.

The charging board is equipped with multiple USB interfaces, which can charge multiple devices. The charging board is detachable. You can remove it at home and place it on the balcony for charging. The capacity of the non sensing solar charging backpack is 30-40L, the three dimensions are 350mm × 220mm × 520mm, the net weight is 1220g, and it is made of nylon.