RJD Batteries offer benefits not usually found on rechargeable coin cells. These include a safer design, with a reduced risk of overheating, as compared to conventional coin-cell rechargeables. Internal encapsulation, with metallic trim is unlike conventional stacking construction, and has improved upon older manufacturing issues which can affect safety and reliability. Despite the changes in internal construction, the RJD series maintains industry standard round package designs, allowing them to be a drop-in replacement for IoT wearables, smart watches, Bluetooth headsets, and hearing aids.