Crunch time! Or? Pure, single-crystalline β-Ag0.33V2O5 nanowires are prepared to serve as electrode materials in lithium-ion batteries. In contrast to stoichiometric counterparts, the structure of the β-Ag0.33V2O5 nanowires is retrievable upon repeated lithium-ion displacement/intercalation reactions. The proposed strategy to stabilize the crystal structure of electrode materials based on a displacement/intercalation mechanism shows promise for application in rechargeable lithium-ion batteries.