Chem. Commun., 2026, Accepted Manuscript DOI: 10.1039/D6CC03092K, Communication Binglin Li, Wanyi Wang, Dongxu Guo, Chen Wang, Chenglin Sun, Shenghan Wang The cycling stability of rechargeable aqueous Zn–MnO2 batteries is constrained by the irreversible loss of active manganese species during charge–discharge cycling. Here, the “cyclable manganese inventory” is defined as the...