Hobbies and Crafts How do I activate my Costco hearing aid? How do I activate my Costco hearing aid? Place the hearing aid in the power-connected Kirkland Signature Charger Case and wait until the indicator light blinks green. This can take up to 30 seconds. The hearing aid is now ready to use. Related Posts:Is Kirklands a Costco brand?Who makes the best cookware in the world?Kirkland Signature 12-piece Hard Anodized Cookware Set is the best set of the year.What is wrong with Costco water?