Syma S107 / S107G upgrade battery 3.7v 240 Mah with heat shrink tube
3.7v 240 Mah Helizone RC branded battery is your solution to upgrade your micro helicopter's flight time and performance!  This listing includes heat shrink tube long enough to change up to 5 batteries.  Follow the simple guided instruction (as pictured) and your helicopter would be able to fly in no time. 1.) Remove cover2.) Cut battery's wires3.) Sheer plastic off of battery wires (attached to battery of helicopter) 4.) Sheer/Cut heat shrink tube (this listing comes with 2 pre-cut)5.) Insert heat shrink tube on to the sheer helicopter wire and twist it together6.) Use a lighter and gently heat the shrink tube over the wires.  CAUTION: Please use caution and adult supervision when using the lighter or any heat source.  7.) Connect head cover back, and test connection.Now enjoy longer flight time as well as better performance.