China’s water battery breakthrough can last 120,000+ cycles, outlast lithium-ion by decades
Chinese researchers have built a water-based battery using tofu brine as an electrolyte that survives over 120,000 charge cycles — compared to roughly 3,000 for a typical lithium-ion battery — while being non-toxic, non-flammable, and essentially saltwater-safe. The catch, as always with lab breakthroughs: energy density is lower, so this won't replace your phone battery, but for grid storage, renewable energy buffering, and data center backups, the potential is enormous. The real question is whether it can scale beyond the lab — most battery breakthroughs don't, but 120K cycles is hard to ignore.