Methods, systems, and devices for battery manufacturing processes are described. A method for manufacturing a battery for a wearable device may include forming a battery cell including a set of energy storage layers, the set of energy storage layers includ...

Methods, systems, and devices related to a portable charging case are described. For example, a portable charging case is described that may convert a ring size-specific charger for a wearable ring device into a portable charger. The portable charging case...