Each hearing aid always comes with a user guide, if you have lost your user guide check out our user guide section to download it.
Phonak Audeo Belong B-R (Rechargeable) B50 Hearing Aid
The Audéo B-R is the first hearing aid ever to feature a built-in lithium-ion rechargeable battery! Exciting times ahead. No need for acquiring batteries. When not in use, simply plug the hearing aids into their charging device, and within 3 hours the hearing aids are fully charged and can provide 24 hours of hearing. There is also an indicator light on the hearing aid to display the battery status. Lithium-ion batteries have a very long lifespan.