Your Samsung Galaxy S9 is a little old now, and that means its battery may be struggling. Boost it with the power of one of the best Galaxy S9 battery cases.

These are the best battery cases for the Galaxy S9 and Galaxy S9+. Cases that will give you a boost of extra battery life and keep your phone safe at the same time. With a big 5.8-inch screen and ...

ZeroLemon Samsung Galaxy S9 Battery Case 4700mAh Price: $40 . Colors: Black. Wireless charging: No. Why we love it: The ZeroLemon Battery case looks the part of a battery case.

We’ve mostly listed battery cases for the Galaxy S9 on this list, but for Galaxy S9 Plus users, you can’t go wrong with the DCASE. It has a massive 5,200mAh rechargeable power pack in it.

X-Doria Defense Shield Case for Samsung Galaxy S9 Plus ... Mophie's Juice Pack battery case for the Galaxy S9 packs a 2,070 mAh battery to complement the 3,000 mAH power pack inside Samsung's phone.

While I think the Samsung Galaxy S9 Plus (see my full review) is one of the best Android phones available today, after using it for more than a month, it is clear to me the battery is just barely ...

The Samsung Galaxy S9 Plus is a gorgeous device, but you'll want to keep such an expensive device safe. Here are the best cases for the Samsung Galaxy S9 Plus.