Amazon.com: 4.5V 1Amp AC to DC Adapter Power Supply, 4.5W 1000ma AC 100-240V to 4.5V, 2.5mm X 5.5mm Plug(Pay Attention to The Size. Make Sure it Works for Your Products) : Electronics
ProTechTrader 3v 4.5v 5v 6v 7.5v 9v 12v AC/DC Power Adapter 12w Supply 1a Universal Transformer USB Port - Walmart.com
Power Supply 4.5V 1A 1000mA AC/DC Adapter UK Plug cord 3.5mm x 1.35mm | eBay
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Sony AC-E45HG AC DC Adapter 4.5V 700mA 10W Power Supply for Walkman | Reverb
Amazon.com: 4.5V 1Amp AC to DC Adapter Power Supply, 4.5W 1000ma AC 100-240V to 4.5V, 2.5mm X 5.5mm Plug(Pay Attention to The Size. Make Sure it Works for Your Products) : Electronics