High power (2A/5V) USB power adapter tested to work well with the OpenEnergyMonitor units and the Raspberry Pi.

Two-prong USA plug. 

Technical 

• Model: 15MX15Z-0502000VU
• Input: 100-240V ~50-60Hz
• Output: +5VDC 2A
• Overcurrent Protection
• Short Circuit Protection
• Approved to CE, FCC, ETL, GS, KC, CCC & RoHS

Documentation 

Datasheet Download

Related blog post: Not all USB power adapters are created equal - highlighting importance of selecting good quality power adapters