Amazon.com: Dell 220W DA-2 AC Power Supply Adapter (MK394)… : Electronics
Dell DA-1 - 150 Watt DA-1 AC Power Supply Adapter for Dell Optiplex SX260 SX270 - CPU Medics
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MK394 For Dell OptiPlex Desktop 220W DA-2 Power Supply - 365PowerSupply.com - Replacement Laptop Power Adapters,Desktop Power Supply & Server Workstation PSU.