Your next laptop could have a continuous power battery that lasts for 30 years without a single recharge thanks to work being funded by the U.S. Air Force Research Laboratory. The breakthrough betavoltaic power cells are constructed from semiconductors and use radioisotopes as the energy source. As the radioactive material decays it emits beta particles that transform into electric power capable of fueling an electrical device like a laptop for years.

Although betavoltaic batteries sound Nuclear they’re not, they’re neither use fission/fusion or chemical processes to produce energy and so (do not produce any radioactive or hazardous waste). Betavoltaics generate power when an electron strikes a particular interface between two layers of material. The Process uses beta electron emissions that occur when a neutron decays into a proton which causes a forward bias in the semiconductor. This makes the betavoltaic cell a forward bias diode of sorts, similar in some respects to a photovoltaic (solar) cell. Electrons scatter out of their normal orbits in the semiconductor and into the circuit creating a usable electric current.

The profile of the batteries can be quite small and thin, a porous silicon material is used to collect the hydrogen isotope tritium which is generated in the process. The reaction is non-thermal which means laptops and other small devices like mobile phones will run much cooler than with traditional lithium-ion power batteries. The reason the battery lasts so long is that neutron beta-decay into protons is the world’s most concentrated source of electricity, truly demonstrating Einstein’s theory E=MC2.

The best part about these cells are when they eventually run out of power they are totally inert and non-toxic, so environmentalists need not fear these high tech scientific wonder batteries. If all goes well plans are for these cells to reach store shelves in about 2 to 3 years.

• Why Microsoft must abandon Vista to save itself
  I think I’ve pointed to the ‘VistaSucks’ site before, but if not, you may want to browse it, it’s always good for a laugh. This post seems to suggest Vista sucks because it’s too much like Mac and Linux…
  (tags: Humor )
• Paul Thurrott’s SuperSite for Windows: Inside Windows Vista Service Pack 1
  Lots of info about Vista SP1 Beta.
  (tags: Beta SP1 Review )
• Windows Vista Team Blog : Redmond Install Fair later this month
  Have Microsoft help you install SP1 Beta on your Vista machine!
  (tags: SP1 Beta Install )
• Creative Sound Blaster X-Fi for Windows Vista 2.15.0003
  The latest Vista driver for Creative’s Sound Blaster X-Fi series of audio devices.
  (tags: Drivers Audio )

If you are running low on hard-drive space it may be time for a purge of files that you no longer use, or have no wish to keep any more. In my previous post on this subject I suggested installing and running the excellent Treesize to find out the size of each folder, and I explained how to clear the cache in your web browser. In this post I will describe what steps to take in a more general purge of unwanted files.

Removing unwanted applications
From the Control Panel and open either ‘Add or Remove Programs’, or ‘Uninstall a Program’ (if you use Vista). Go through the list of programs and remove any that you don’t use any more. This may sound like obvious advice, but the easy availability of freeware programs means that many of us have collections of applications installed on our machines that we played with once or twice and then forgot about.

Removing non-essential files
Over time, Windows collects various temporary files, logs and other non-essential files. To delete these, go to the ‘Start’ menu and select ‘Search’. You may then have to select ‘All files and folders.’ In the search field type ‘*.gid’ - without the quote marks - and hit the Return key. Windows will then search your PC for these index files, which help files generate. It should be safe to delete all of these, however, you may want to keep these files in the Recycle Bin for a while, just to be on the safe side. You can repeat the process searching for the following:

‘*.chk’ (these are files created by disk check process)

‘*.dmp’ (these are memory dump files created when certain versions of Windows crash)

‘thumbs.db’ (these are created whenever you look set the folder view option to ‘Thumbnails’)

Switching off thumbnail cache
If you have a lot of images stored on your PC, you may want to switch off thumbnail caching. This will prevent Windows from creating any new ‘thumbs.db’ files, but will mean that the thumbnail view of a directory containing lots of images will take longer to show them all.

To switch of thumbnail caching, open ‘My Computer’ (or any other Windows Explorer screen) and select ‘Folder Options’ from the ‘Tools’ menu. On the dialog box that opens, go to the ‘View’ tab and tick ‘Do not cache thumbnails’.

Don’t forget your emails
If you use an email application on your PC, rather than webmail, then your emails will be taking up some of your hard drive space. So, in order to recover some hard drive space it may be time for an email purge. If your email application has a ‘Recycle Bin’ or ‘Deleted Items’ folder, remember to empty that when you are finished purging. If you have attachments in the emails that you have also saved elsewhere on your PC, then you are storing the same thing twice: delete one or other of them.

Hopefully these tips have enabled you to recover at least enough hard drive space to stop those annoying ‘Low Disk Space’ messages. If any of the above processes didn’t work on your version of Windows, please let me know as each different version of the OS has its own quirks, which I may have forgotten.

Congratulations are in order for our good friend Kristan M. Kenney (currently of Windows Now) has just been made the latest Microsoft Windows Shell/User MVP in the most recent round of MVP appointments.

Kristan Kenney’s contributions to Windows Vista community started before the Vista beta program even began, and it’s always been just a matter of time before this appointment happened. From the days of 4074 to RTM and now SP1, Kris has been at the forefront of finding tricks and hacks to make Windows Vista a more enjoyable experience. Hopefully we can expect even more (and greater) contributions to come from Kris in the future.

Congratulations, Kris, you deserve it!