NEW / FACTORY SEALED — Genuine Phonak Audéo RIC 312 Battery Door (OEM). 1 × Genuine Phonak Audéo RIC 312 battery door in the color selected. ✅ Designed for Audéo RIC 312 hearing aids. Regular Battery Door for Audéo using battery size 312 (Marvel and Paradise) Audéo M 312T use different battery doors .