While replaceable batteries work great for some people (they’re small enough to fit in your pocket), they do require that the user has a certain level of dexterity. Because they are so tiny, they can be easily dropped or misplaced when they’re not activated in the hearing device.
As an alternative, rechargeable hearing aids use Lithium-ion technology. This means there’s just one permanent battery in the device that’s recharged externally when plugged into a charger. In fact, with Lithium-ion technology you won’t even need to think about purchasing and replacing batteries – simply plug your hearing aids into your reusable charger and enjoy quality sound every time.