What size battery do I need in order to run the SwayControl? BMPRO Customer Support December 17, 2021 01:20 The SwayControl requires a 12V battery system of greater or equal to 50Ahr. Related articles How long does the SwayControl stay active after being woken up by braking? How do I remove the LED light on the SwayControl? Comments 0 comments Please sign in to leave a comment.