The world's most powerful Lithium Polymer battery packs just got even more power! EVO25 is the next generation of Lithium Polymer battery pack for RC flight from FlightPower. The continued in-house development of lithium polymer chemistry has allowed even more performance from your packs. The penalty? None! No increase in weight, no increase in size and no increase in price! With 25C continuous, 35C sustained (for climbouts) and 50C burst ratings, this means even better voltage held under load and even higher RPM whatever the application.