Amazon.com: SDTC Tech 5pcs T Type 9V Battery Clip Connector Positive Negative Snap Lead Wire(15cm) : Electronics
9-Volt Battery Connector - StewMac
LAMPVPATH (Pack of 5) I-Type 9V Battery Connector, 9 Volt Battery Clip, 9V Battery Clip Connector with Wire and Hard Buckle Plastic Housing : Health & Household - Amazon.com
9V Battery Clip with DC Plug – Makerlab Electronics