Great information over at the Eaton blog about suspect electical devices.

Your service providers should have good relationships with reputable suppliers, and when it comes to UPS systems and other electical power equipment, safety is a key concern. Make sure you know that the people working on your data center or network operations center are using authentic supplies and components on your job. The integrity of your operation and the safety of your employees could depend on it.

More at the Eaton Website