18650 rc helicopter battery 3.7v 5000mah 1)Low self discharge 2)High-quality ... Advantages:1, High energy density2, High working voltage for single battery cells3, Pollution-free4, Long cycle life5, No memory effect6, Capacity ... , Good consistency, low self discharge10, Light weight, small size 18650 Rc helicopter battery 3.7v 5000mah