Amazon.com: appuivbt AC 100-240V for DC 1.5V 1A Clip Converter Power Supply Adapter 1.5V Battery Eliminator with US Plug for Electronic Devices : Everything Else
OOKWE AA Battery Eliminator US Power Supply Adjustable Voltage 3V 4.5V 6V 9V 12V Adapter Can Replace 2AA to 8AA Batteries - Walmart.com
Universal AC to DC Power Supply Wall Plug Adapter 1.5 V 3V 4.5V 6V 7.5V 9V 12V | eBay