A power head for a surgical apparatus is disclosed having at least one battery-retaining structure (800) defining a battery ejection path. The battery-retaining structure (800) is configured to receive at least one battery. The power head further includes at least one sealing member (950) extending around the one or more battery-retaining structures (800) and configured to enable ejection of at least one battery from the structure (800) along the battery ejection path. The power head may include a handle assembly (112) that includes the battery-retaining structure (800). The sealing member (950) extends around the structure (800) such that the sealing member (950) is configured to enable ejection of at least one battery from the battery-retaining structure (800) by one hand of a user. The power head may include at least one energy storage mechanism (936) that enables ejection by one hand of a user of at least one battery.
