A portable electronic charging case, with a compact form-factor, such as for a smart ring or the like, includes a base; a front cover connected to the base and configured to seal an interior of the charging case; a post on the base and in the interior; an antenna disposed within the post; and circuitry connected to the antenna and to a charging port located on the base. The electronic charging case includes advanced functionality, an aesthetic design, and a compact form-factor. The compact form-factor includes an embedded battery, an environmentally sealed design, and a small NFC/Bluetooth antenna. The aesthetic design includes no user-actuated mechanisms on an exterior of the charging case and an intelligent light sensor for illuminating the charging case. The advanced functionality includes the embedded battery, intelligent light sensor, a temperature sensor for monitoring a user, and monitoring techniques working in conjunction with an associated wearable device.