Have we got a deal for you …

Sorry for returning to the xMax story again and again, which was not my intention when I started this blog, but the xMax related claims are so outrageous that I find them irresistible. A reader sent me pointers to online documents talking about xMax and saying: “A little-known start-up has demonstrated wireless broadband 1,000 times more efficient than WiMax — and claims the technique could also make wireless LANs that will run for years on watch batteries.” If you type into Google the words `xMax’ and `watch batteries’ you will find many more mentions of this.

Now a typical watch battery has a charge of 40 milliamp hours. There are 8760 hours per year. So this wireless LAN will consume 4.6 microamps on the average assuming one year of operation, or less if we assume several years. For comparison consider that a typical 802.11 PC card consumes 20 – 30 milliamps in sleep mode, i.e. when it does not transmit or pass data. It consumes much more when it is transmitting or receiving data. So we are talking about a 1000 – 10,000 reduction in total power consumption at the very least. If you believe that, I have some beach front property I would like to discuss with you …

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