Power is great, and I can easily get 5min on my OMP M7. Love the 12S configuration, but having the same connectors on all 4 leads is very dangerous. In order to make a 12S battery, you plug a male/female together. If you're not paying attention, and plug the wrong male/female connectors together, REALLY bad things happen. I changed the connectors that plug together to XT150s to prevent accidental shorting.