I deducted one star because it might have been a better design if there was some provision to accommodate a USB cable plugged in so you can charge something while the battery is inside the case

but it looks like superior design, depending on your purpose and needs.

Good design and will last for 100 years with normal use.

I also ordered the EVA travel case which seems to perhaps have a superior design allowing you to even have the phone inside the same case while it's being charged