The energy supply of rising electronic textile can resort to gel-based fibre batteries attributed to their flexibility and safety. However, their electrochemical performance is plagued by the poor electrolyte–electrode interface. Recently, Peng et al. designed channel structures to accommodate gel electrolyte yielding intimate and stable interfaces for high-performance fibre batteries. Encompassing excellent electrochemical performance, stability, safety and large-scale productivity, the as-fabricated fibre lithium-ion batteries (FLBs) demonstrated the potential to supply energy for textile electronics.