Solid-state lithium microbattery technology is poised to leapfrog Li-ion and Li-poly alternatives for hearable and wearable devices. By Arvind Kamath, Ensurge Micropower The more popular digital health and fitness wearables and hearables become, the more frustrating the shortcomings of their rechargeable microbatteries. Decades-old Lithium-Ion (Li-ion) technology has reached its limits while handcuffing product developers to…