The ReSound LI Charger is a portable charging case designed for use with ReSound Preza rechargeable Receiver-In-The-Ear (RIE) hearing aids sold at Costco. It features an integrated lithium-ion battery that provides at least three full hearing aid charges on a single charge, making it ideal for travel and extended use away from a power outlet.

A full charge for the hearing aids takes approximately three hours. LED indicators on the front of the charger display the battery level of the hearing aids, while three LEDs on the back indicate the charger's own internal battery status. Hearing aids automatically power on when removed from the charger and power off when inserted, simplifying daily use.

The charger is compatible with the ReSound Preza LI RIE hearing aids (Type C-1 charger). The hearing aids charged by this device support Bluetooth streaming, are "Made for Apple" certified for direct connection to iPhone, iPad, and iPod touch, and are controllable via the ReSound Smart 3D app. Compatible wireless accessories include the ReSound TV Streamer 2, Remote Control 2, Phone Clip+, Micro Mic, and Multi Mic.