Hyperion is fixing to release ( and will be stocked in my shop)a new 25C discharge,5C charge rate single cell lipo that will work in E-Flite ultra Micro Aircraft. The is a 3.7v 130mah battery.The battery has the corrct plug already on it for thse aircraft, they also come with the male plug so you can use other chargers.They will also offer it in a 180mah version.Dont know what the price will be just yet..I should know more any day now..