Batteries in mobiles and laptops to run 100 times longer

A team of electrical engineers at Illinois University in the US believe their method will enable mobiles and laptops to run for up to 100 times longer between charges.

It focuses on changing the way a device’s digital memory works, as this consumes much of the charge.

At the moment mobile phone memories contain thin metal wires. Every time information is accessed, electricity is passed through them to retrieve the data.

The electrical engineers thought that if the size of the components used to store and retrieve the information could be reduced, so could the amount of electricity.

They have discovered a way of using carbon nanotubes – tiny tubes 10,000 times thinner than a human hair – instead.

The full article is in the Daily Telegraph


  1. #1 by Ampers on Friday, 11 March 2011 - 10:15 am

    I have been in and out of journalism since 1955 so if you are willing to bow to my superior knowledge, it is less likely that you have erred, and a damn sight more likely that the Telegraph journalist has 🙂

  2. #2 by mechris3 on Friday, 11 March 2011 - 10:02 am

    The journey to 300 hours between charges is very likely to be via incremental improvements so even if they have managed to double the length between charges, this certainly not an achievement to be belittled. I am certainly no electrical engineer, or in anyway knowledgeable in this field. I was just applying back-of-the-enevelope type calculations to the story as presented buy the paper.
    It is possible that a journalist somewhere has misunderstood things – or indeed that I have ;-).

  3. #3 by Ampers on Friday, 11 March 2011 - 9:50 am

    There you go again, spoiling a good story with facts!

    But joking aside, it will be interesting to see if the claim is for the whole phone or laptop, or whether they have just managed to reduce that part of the phone power by a hundred times.

  4. #4 by mechris3 on Friday, 11 March 2011 - 9:30 am

    I find this dubious. If we assume a battery currently lasts 3 hours, and that the power consumption of the memory can be driven to effectively zero, we still have to power the hard drive and screen. Even if we assume no hard drive, and that storage is solid state, I would be surprised if a screen alone could be powered for 2 weeks solid on a single charge.

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