An implantable medical device (IMD) including an insulating frame defining a drop-in coil channel adjacent a perimeter of the insulating frame, a rechargeable power source configured to supply power for the implantable medical device, a secondary coil including a first and a second wire end, where the secondary coil is received within the drop-in coil channel and is configured to inductively couple with a primary coil of an external charging device to transcutaneously charge the rechargeable power source. The IMD also includes a circuit board attached to the insulating frame and a pair of electrical connectors each having a respective first arm that is electrically coupled to the respective first and second wire ends of the secondary coil and respective second arm that is electrically coupled to the circuit board.