Disclosed is a surgical instrument, comprising an end effector configured to grasp tissue. The end effector comprises a jaw, and a staple cartridge seatable in the jaw, wherein the staple cartridge comprises a sensor array. The surgical instrument further comprises a power source configured to supply power to the staple cartridge, and a transmission system. The transmission system is configured to wirelessly transmit the power from the surgical instrument to the staple cartridge, monitor an efficiency of a transfer of the power from the surgical instrument to the staple cartridge, and adjust a transfer parameter based on the efficiency of the transfer.