To illustrate the generalization of this system to other redox chemistries, we demonstrated cycling of three other pairs of electrolytes in mild pH-decoupling ARFBs. Fe(Bhmbpy)3 at pH 3 and dibutanoate ether anthraquinone (DBEAQ) at pH 12 were used to demonstrate the cell performance under milder pH difference with non-PCET electrochemistry in both sides (Fig. ). This milder pH-decoupling cell exhibited better stability and required infrequent addition of acid and base. With in situ pH recovery, the cell also showed similar BPM overpotential to that of the model cell with BHPC, and we measured an overall fade rate of < 0.07% per day with 99% Coulombic efficiency (Extended Fig. ; Fig. ). The polarization test of this cell revealed similar high energy efficiency but a slightly smaller power density because of its lower OCV (Fig. ).