In some implementations, a metal air battery includes a body defined by a metal anode and a cathode, a first separator layer disposed on the metal anode, a second separator layer disposed on the cathode, and a plurality of beads disposed within the body. The beads may confine a liquid electrolyte, and may be configured to release the liquid electrolyte into interior portions of the battery in response to a compression of the cathode into the body of the battery.