It would seem that the scale on the graph of battery capacity on page 44 of the 12/1/08 issue may be off. I made a quick comparison to lead acid batteries that I have for electrical storage. My Trojan 105 batteries weigh about 25 kg--60 lbs and are 6 volts rated at 220 amp hours per battery. This is the same as 6 volts x 220 amp or 1320 watt hours. This lead acid battery would fall on the graph at about 53 watt hours per kg kg.a--above all the rest of the kg--above









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