Amazon.com: LAMPVPATH 3Pcs 3 AA Battery Holder with Switch, 4.5V Battery Holder with Switch, 3X 1.5V AA Battery Holder Case with Wire Leads and ON/Off Switch(3 Pack) : Electronics
Slot Aa Battery Case 1.5v/3v/4.5v/6v | Battery Storage Boxes Aa - 1/2/3/4 Slot Aa - Aliexpress
4 AA Battery Holder with 6" Wire Leads, Plastic Case (2.25" x 1.20" x 1.10") | eBay
Amazon.com: (Pack of 2) 3 AA Battery Holder, 3 AA Battery Case Box Holder 4.5-5V with Cover and On/Off Switch, with USB Cable : Electronics