Shure SBC10-100-US Single Battery Charger for SB900/A/B Lithium-Ion Batteries
Works with the UR5, P9RA, P10R, QLX-D and ULX-D digital wireless monitor and wireless microphone systems. It can be powered from both A/C power sources as well as USB ports. This is a great way to keep your spare battery (do you have one?. ).