However, one last barrier to portability remains charging batteries. 대부분의 디바이스에서는 여전히 며칠마다 충전이 필요하며, 제품을 벽에 묶어두어야 하는 불편함이 있습니다. A group led by Chris Stevens at Oxfords own Department of Engineering Science wants to change that, via inductive technology.