Amazon.com: LR6 AA Battery Eliminator, AC to DC 3V 4.5V Power Supply Adapter,3 Connectors, Replace 2 or 3pcs 1.5V AA Battery,for Decorations LED Light,Indoor and Outdoor : Electronics
3V Power Supply - DC (2 pcs AAA Batteries Included)
AC-DC 3V-12V Power Supply Adapter for 2-8 AA Battery for LED Light Decorations - AliExpress
3V DC AAA Battery Pack [CP-TI-220] - $8.45 : Calpac Lasers Diode Modules Pointers and Levels, 20 years of experience specializing in industrial and promotional laser diode applications