The emergence of redox-active covalent organic frameworks as promising electrodes for rechargeable metal-ion batteries has revitalised the field of organic batteries in recent years. Some of their advantages over conventional electroactive organic polymers are the presence of ordered channels to improve ion diffusion and their crystalline nature, which allows their structures to be modelled and some of their properties to be predicted. In this Feature article we have discussed some of the recent strategies to improve their electrochemical performance (energy density, power density, cycling stability) either by molecular design or by electrode optimisation.