This is not robotics so it might not be appropriate for this forum. (I won’t mind if a moderator deletes this post.) But I wired up a Pololu voltage regulator for powering 9 volt guitar pedals from an 11volt 1500 mAh battery for drones, and it works great. It adds less noise than plugging the pedals into the wall with a wall wart and it more economical than using 9 volt batteries. The S10V3F9 stays cool. Thank you Pololu for your support!