HQRP 9V Battery Snap Connector and AC Adapter Compatible with 9-Volt/Radio/Square / 6LR61 / 7.2
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
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Onlyoa 9v Battery Snap Clip Button Interface Connector Lead Wire T Type 9v Battery Box Battery Cap - China Wholesale Wavelink 9v Battery Snap Clip Connector To Dc Male $0.09 from Shenzhen
9 Volt Battery Connector, Snap-on Connector with Leads - RR21014
150mm Wiring Black Snap Connector for 9 Volt Battery - China Connector for 9 Volt Battery, Battery Snap Connector | Made-in-China.com