Branded Solar Power Bank, Solar Card

The Solar Card is a fantastic Power Bank with an innovative design. It features an enlarged branding area on one side and a solar panel on the other side that's designed to convert energy from the Sun into power that recharges the Power Bank. You can also recharge the Solar Card by conventional means via the USB-C input. A great promotional product idea that'll be kept for years. 

How big is the market of solar chargers/power banks? - Quora

Why don't smartphones have a built-in solar charger? There is plenty of surface area on the back of the phone and even the screen itself could be used. - Quora

This credit card sized solar power bank comes with fast-charging and lets you plug in any device - Yanko Design

Introducing the Solar Card Power Bank

Red Solar Power Bank with Light (GEE-LITE) at Rs 749/piece in Varanasi

: Electronics

BLAVOR Solar Power Bank,Qi Wireless Charger 10,000Mah External Battery Pack With Type C Port,Dual Flashlight&Compass(Ipx4

Sai Enterprises Back Cover Solar Power Bank at Rs 749/piece in New Delhi

Sai Enterprises Back Cover Solar Power Bank at Rs 749/piece in New Delhi

Branded Solar Power Bank, Solar Card