Similarly, in Glastonbury, CT, a Whole Foods grocery store kept the coolers running during a power outage with its 200-kW fuel cell made by UTC Power, which dramatically reduced inventory losses resulting from food spoilage.
The Tesla Roadster, which indeed uses Li-ion batteries, stores 56 kWh of electric energy and delivers up to 215 kW of electric power (a NiMH battery pack with the same electric energy would weigh over twice as much).