Rechargable battary with non-metallic casing for a hearing device

The disclosed technology comprises a non-metallic rechargeable battery casing for a hearing device. For example, the battery casing comprises a polymer or plastic that encapsulates the battery chemistry (e.g., Li-Ion). The battery design has no additional metallic layers or metallic casing; rather, the battery is comprised of non-metallic lid, non-metallic can, and the battery chemistry is inside the non-metallic lid and can.