Synology 1815 DS1515 + NAS Network 531 Power Supply DPS-250AB-44B - 365PowerSupply.com - Replacement Laptop Power Adapters,Desktop Power Supply & Server Workstation PSU.
PSA: Don't trash Your Atom C2500 based NAS yet! : r/synology
Synology DS1815+ RAM Upgrade to 6GB - Tech Thoughts