If your MagSafe cable or power adapter isn't working - Apple Support
Apple MD506LL/A Genuine 85W MagSafe 2 Power... at MacSales.com
How to Repair a MagSafe Connector - iFixit Repair Guide
Apple 45W MagSafe 1 A1374 Power Adapter for MacBook Air MC747CH/A - WIT Computers
45W Charger Adapter T-Tip Style Replacement Compatible for MagSafe 2 Charging Power Converter to USB Type C Female Applicable for MacBook Pro 11" 13" Connector Compatible MagSafe 2 Adapter - Walmart.com