Thursday, February 08, 2007
Snow!
For most people in London, snow is just another regular yearly occurence. But where I come from, it's quite a novelty!
Wednesday, February 07, 2007
USB Rechargeable Batteries
Here is the cool gadget of the day:
these are apparently available now at this site:
http://www.usbcell.com
The price is also cheaper than I would have expected - £12.50 for a 2-pack of AA batteries.
They also have AAA and 9V batteries, and are apparently developing cell phone batteries.
I've seen some discussion about these. Apparently the USB design means they are really only half as efficient as normal Ni-mh batteries, which already have a fairly disappointing efficiency. An alternative was suggested, for longer life and lower cost, here. Of course, this one requires you to carry around a charger - but at least it's still a USB charger!
Another guy has actually done some detailed experiementation to analyze actual discharge results for different types of rechargeable batteries. His results are posted here.
these are apparently available now at this site:
http://www.usbcell.com
The price is also cheaper than I would have expected - £12.50 for a 2-pack of AA batteries.
They also have AAA and 9V batteries, and are apparently developing cell phone batteries.
I've seen some discussion about these. Apparently the USB design means they are really only half as efficient as normal Ni-mh batteries, which already have a fairly disappointing efficiency. An alternative was suggested, for longer life and lower cost, here. Of course, this one requires you to carry around a charger - but at least it's still a USB charger!
Another guy has actually done some detailed experiementation to analyze actual discharge results for different types of rechargeable batteries. His results are posted here.
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