Accessory apparatus for improved recharging of implantable medical device

An apparatus configured to be placed about an implantable medical device having a face with a geometric center offset from a center of a recharge coil of the implantable medical device, the apparatus comprising:

• first and second opposing major exterior surfaces;
• a continuous exterior side surface joining the first and second opposing major exterior surfaces;
• a cavity defined between the first and second major surfaces and the continuous side surfaces, wherein the cavity is configured to receive the implantable medical device, wherein an opening in the apparatus is formed by the first and second major surfaces and the continuous side surface, wherein the opening is in communication with the cavity and is configured to allow at least a portion of the implantable medical device to access the cavity;
• and
• an asymmetric region formed between a portion of the first and second major surfaces and the continuous side surface, wherein the asymmetric region is adjacent to the cavity and wherein the implantable medical device and apparatus together define a combined face and wherein the geometric center of the combined face aligns with the center of the recharge coil.