5 Best Galaxy S9 Battery Cases

i-Blades Galaxy S9 Smart Case ($99)

i-Blades is something completely different from everything on our list. This isn't your typical battery case either. 

With i-Blades, you get a slim and sleek case for the Galaxy S9 or Galaxy S9+ that looks like any other case. However, it has a few "smart" connectors on the back that do some magic. For $99 you get a case and a battery pack. 

This way you have a phone that's protected and safe without being bulky, but if you need it, you can snap on the magnetic i-Blades battery pack. They don't say how big it is, but promise an extra 10 hours of calls or 20 hours of music listening, so likely double that of the Galaxy S9. 

Furthermore, i-Blades sells another "blade" that snaps on the back and gives you additional storage, if you don't have a microSD card, or need even more space on your phone. It's somewhat odd and unique, but it's one more option for those looking for protection and increased battery use. 

Buy it for $99 from i-Blades