Xbox 360 controller 18650 lithium battery case

thingiverse

This is a custom Xbox 360 wireless controller battery case made specifically for 18650 lithium batteries. After printing, use two 1.5cm pieces of nickel strip as contacts between the case and the controller itself. Connect two wires to the battery, then attach the other ends to the nickel strips. The battery will be charged using a TP4056 charger module. Secure the two halves of the case together with superglue. P.S. On older models of the Xbox 360 wireless controller, the green LED ring remains dimly lit even after the console is powered down, so you'll need to remove the battery afterwards. Also, on these older models, the vibration feature will not work properly either.