Thing to put 18650 case with a charge board

I didn't find any box for my board who come from an usb batterie .I didn't have any charger for my 18650 batterie .So I broked it to use as a charger .It was not safe at all so I did this "boxe" .I didn't find any other who fited this electronic board . the size of my bord is 1.8cm*2cm. I hope it will help some of you :)