TheEEStory.com

One little quibble with one of the things he said about the Volts battery. The 5000 cycles refers to "deep cycles". Wear and tear on a battery goes up exponentially with depth of cycle. That's why they don't use the entire range of available charge on the battery. The 5000 cycle number is the worst case scenario under the worst case conditions. The way GM babies their battery, cycle life is less likely to be a problem than shelf life. Not only that but the battery is bigger than is required so that they can lose capacity and still deliver the advertised AER.