Voodoo Lab Battery Snap to 2.1mm Pedal Power Cable - 18" Str-9v Snap | Sweetwater
Amazon.com: 5pack 9v Battery Clip with 2.1mm X 5.5mm Male DC Plug for Arduino by Corpco : Electronics
9V battery clip
9V Battery Connector
9V Battery Snap – Guitar Pedal Parts
Electronics: 9 Volt Battery Snap Connector - Shop - GBFans.com
Amazon.com: DZS Elec 6pcs 15CM 9V Battery Snap Connector Clip Lead Wire Experimental Battery Snap Power Cable with 5.5x2.1mm DC Male Plug for Arduino Project or LED Light Bar : Electronics
9V battery clips to DC barrel | Prop Scenery Lights
9v Battery Clip - Plastic
9V Battery Snap Connector - Solarbotics Ltd.
Snap 9V (9 Volt) Battery Clip Connector I Type Black Black 15cm HOTS Cable N1D8 | eBay
JST Battery adaptor: Dual battery adaptor for connection to 9V batteries.