Many different sizes of Li-ion batteries are available; Rechargeable li-ion batteries are lightweight. Li-ion battery can be custom made for high capacity, or high discharge rate. Can be discharged at very high C rate (High discharge rate - High Drain). 18650 battery is most popular rechargeable 3.7V li-ion size today.
An employee by the name of Willie Griggs decided to file a lawsuit on behalf of himself and twelve other employees against Duke Power Company. Griggs' claim was that the diploma requirements and the intelligence tests were used as an intent to discriminate against black employees and were against the Title VII of the Civil Rights Act of 1964.
DCiE Example: Having that same facility that uses 100,000 kW of total power of which 80,000 kW is used to power your IT equipment, would generate a DCiE of .8. The 80,000 kW of IT power divided by the 100,000 kW of total facility power. Generating PUE / DCiE is only a start on your path to efficiency. For this benchmark to be meaningful it should be generated on a regular basis and preferably also on different days of the week and at different times of the day. The goal being to take actionable efficiency actions based on your actual data.