Lenovo 45W Standard AC Adapter (USB Type-C) - power adapter - 45 Watt - 4X20M26252 - Laptop Chargers & Adapters - CDW.com
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power supply - Why are some AC/DC adapters light while others are heavy? - Electrical Engineering Stack Exchange
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Amazon.com: 12V AC/DC Power Adapter 5.5mm x 2.1mm Plug 1A(1000MA) UL Listed Power Supply : Electronics
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