The flow-assisted Ni-Zn battery we have connected to the electrical grid in our building at City College is racking up cycles for the fall. We’re using this research to make adjustments to the way the individual cells balance with respect to each other. That’s because the dendrite-killing methods we developed keeps the individual cells going cycle after cycle, but keeping them all in synch with each other is an extra challenge you face when combining many battery cells into an integrated battery system.