Combine the popular Phonak Charger Case Combi with the Phonak Power Pack attachment and save! The Phonak Power Pack turns an ordinary Phonak Charger Case Combi into a portable charger and protective hard case for your hearing aids. The Charger Case and Power Pack combo lets you charge rechargeable Phonak hearing aids up to seven times for situations when you're on the go, or when a power source is not available.