Furthermore, on disassembling the cell after experiments, an orange-brown precipitate was observed within the apparatus (Figure and Figure ). These results were the first indicators of the crossover-driven side reactions reported herein. As hypothesized, losses in 2,6-DHAQ 1 H NMR signal result from the battery being held at a high state-of-charge. The next challenge was to identify which factors were important in causing this process to occur.