It also gets a native PDF reader, previously only found in the Kindle DX. The total battery life for the international version measures at seven days with wireless on (up from four days), and two weeks with wireless off (same as before).

It looks like Amazon just improved the wireless usage, which might have come as a result from switching from using Sprint as the provider to AT&T as a provider? Probably not, seeing as previous Kindle users also get the 85 per cent battery life from a firmware upgrade delivered automatically. PDF support comes over OTA upgrade as well, but no timeframe was announced for either. [Press Release]

The questions were thrown at me by our dear Brian Lam with a disclaimer of “I may have been under narcotic substances when I came up with this idea.” But, despite that disclaimer, he’s onto something. After all, we’ve looked at concept models of gadgets intended to be powered in that precise manner and there’s been some success in recent bio-battery research. So, why aren’t we using our bodies as power sources yet?

It turns out that the bio-batteries closest to reality at this time have a major problem with waste products. That waste is created as those particular batteries involve microbial yeast-based fuel cells that steal “some of the electrons produced when the yeast metabolises glucose” in order to create a small current. The entire process works just fine, but the yeast cells are at risk unless the waste products are removed. As the waste can’t very well just be dumped into the bloodstream, a proper cleaning process needs to be invented. Until such a process is sorted out, the batteries could pretty much be considered either suicidal or homicidal in nature as either they die off or they poison your bloodstream while trying to survive.

That trouble aside though, the research is quite encouraging and a huge first step in the right direction. So while it may still be many years away, one day we will in fact sate both gadget lust and hunger in the same bite. Please pass me the Häagen-Dazs while I wait for that day when fat bottomed girls could really make the rockin’ world go ’round. [New Scientist]

The 2011 Nissan Leaf: It’s going to be the first “mass-market” pure-electric car. It’s not the first electric-car period, but the “mass-market” qualifier makes it OK. I guess. And the 160km range. And it’ll be about $30,000 before a $7500 tax break, so you can afford it. And we love Nissans. [Popsci]

The Sikorsky X2 Helicopter: It’s going to be the fastest chopper in existence based on the fact that there are counter-rotating rotors and a backwards-facing propeller that pushes the whole thing forward. It may not look like a helicopter you’re familiar with, but it’s pure sweetness. [Popsci]

Diamond Interchange: This new traffic intersection type can “reduce clogging by as much as 60 per cent”, which bodes well for drivers everywhere. You don’t need to know how it works, you just need to know that it does, and convince your local MP to change over to this style. [Popsci]

Powergenix Rechargeable AA Batteries: These are supposed to be, thanks to better Nickel-Zinc technology, as good as disposables — but can last up to 1000 charges. They’re not too expensive either, comparatively, at $US15 for four. [Popsci]

Sennheiser HD800 headphones: Sennheiser’s HD series are expensive (boldly expensive), but very much worth it. The 800 is just another reason why you should be taking night classes in order to get a better job to pay for these. $US1400 isn’t something you throw down casually, but if you’re talking sound quality AND comfort (others can do one or the other), you’ll have a hard time beating Sennheiser. [Popsci]

X-Flex Blast Protection Wallpaper: These sticky, rollable, self-adhesive sheets can be applied to any wall that you think will be the subject of explosions. In turn, the walls stay vertical and the occupants inside the building say alive. Popsci says these things kept a wrecking ball from going through pure brick, so it’ll definitely keep your angry teenage kid from putting his fist through your drywall. [Popsci]

Filigent Limited BioMask: A face mask — like the kind everyone wears in Japan when they’re sick — that kills 99.9 per cent of flu viruses in less than a minute. And 100 per cent after 10. A regular mask still holds 50,000 bugs (on average). If you want one of these you’ll have to import it from Hong Kong or Europe, where it’s more acceptable to wear one of these on the street. I should really stock up on these for CES next year; not because it’s going to be a mass of diseased bodies in a confined space, but because Adam Frucci is really disgusting. [Popsci]

Xela Innovations Purleve Hygienic Door Handle: The door handle is actually a sleeve dispenser, so instead of touching poopy metal, you touch a removable plastic sleeve whenever you have to get out from the can. It’s genius, even if it is slightly wasteful to refill sleeves all the time. But if we have no problem protecting our arses from public toilets with disposable toilet rings, this should sell just as well. [Popsci]

Microsoft’s Project Natal: If there’s one game development we’re looking forward to, it’s Natal. Imagine combining the fun of being at home with the fun of moving around in your living room and having a machine know exactly what you’re doing. Perhaps we should phrase it another way: Whenever Mark and I play any game, he says “imagine how great this would be with NATAL!!!!” He actually pronounces those exclamation points out loud over Xbox Live so I get how serious he is. [Popsci]

Bosch Full Force Technology Nail Gun: You might not use nail guns every day, but when you do, you really want to savour the experience. In this case, Bosch uses a secondary air blast that follows the first nail-ejection one in order to return the piston into firing position. So the nail gun literally goes pew-pew with each shot. As a result, the gun is 20 per cent smaller and 10 per cent more powerful than anything else. With one of these, everything you own becomes a board. [Popsci]

“The mPower Reserve Battery offers an unprecedented minimum shelf life of 20 years and has an immediate activation to full power. Through an intricate battery design, mPhase developed a way to eliminate power dissipation before initial activation.”

The torch uses an intense, high-performance LED, and has an accessory USB connection to charge your mobile devices. It’s slated to arrive in March, but we hope to get a better look at it at CES in January. [CNETand Yahoo News]

It varies from netbook to netbook — Toshiba’s NB205 withstood Windows 7’s power greediness better than HP’s Mini 311. It’s somewhat expected though, with features like the fancier Aero user interface to name one probable cause. Personally, I’ll take Windows 7 and the dead battery. [Laptop]

1. Since a battery should never be 100 per cent full or 100 per cent empty, you should charge it then discharge it in sequence ideally ranging between 80 per cent to 20 per cent. Start by charging for 12 minutes, then running it down, then charge it for 11 minutes then run it down, and so on. Confused? Just use this handy formula: n!=C(n,k)/r! where n can’t equal r, and k never reaches zero. Simple!

2. If you use a phone or laptop without first charging its battery fully, you will die.

3. A lot of battery experts warn of the memory effect, but it’s not really an “effect”. It’s just their way of saying “Remember to charge your batteries!”

4. Batteries run better when cold. The easiest way to do this is to find a refrigerated warehouse, befriend the security guard, and do all your work from there. ($20 bribes usually work.)

5. If your laptop battery gets hot enough to sear tuna, step away. Check your fridge for tuna. If no tuna in fridge, run to the supermarket to buy tuna. Don’t worry, as long as you don’t unplug your laptop, the battery will stay hot while you are gone.

6. When putting your laptop into storage, take out the battery. Wrap the extracted battery in a well-oiled cloth and place it in a clay pot. Bury the pot in a hayfield. Any will do, but it’s best if there’s a long rock wall with a big oak tree at the north end. The battery should keep fresh for up to six months that way. If you’re worried about finding it again, just mark your spot with a rock that has no earthly business in a hayfield. I favour black volcanic glass.

7. If your battery is about to run dry, take it out and blow on it. I have no idea why this works, but it totally does.

8. If your battery does die, you can always make your own: A potato theoretically has enough “potential energy” stored inside to power a laptop for a full hour — the trick is knowing where to stick the wires. Just ask a third grader. One tip: The potato must not be baked.

9. You should never confuse your batteries. Here’s an easy way to keep them apart in your head: Lithium Ion batteries explode, Nickel Cadmium destroys the environment and Lead Acid batteries are more corrosive than the Alien Queen’s blood (plus, they contain lead). You can eat Lithium Ferro Phosphate batteries.

10. People may tell you to carry a battery-life extender in your bag, but the secret there is, it’s just another battery. What do I recommend? Jumper cables.

Frederik Krebs came up with this combination of solar panels and LED lights which, while definitely a work in progress, could bring cheap light to some of the world’s poorest regions. I call the lamps a work in progress because despite being durable enough to last several years, they run at a mere 1 per cent efficiency. But with the expected final cost of $US7 a piece, they’re full of life-changing potential.

Some prototypes of the lamps are currently being tested in Zambia. As seen in the picture, the solar panels are left laying flat during the day and then rolled up (and secured with a snap button) into a cone-shaped lamp. I’m definitely looking forward to seeing the results of the prototype tests and a final product, because no one should go without artificially lit nights. [IEEE Spectrum via Pop Sci]

Now, the FAA says the airlines need approval from the FAA’s hazardous materials division, and has asked them not to store spare lithium ion batteries for the readers on planes. A few airlines went through some special training to get the OK, but at least Delta and JetBlue don’t carry spares or charge the readers on board at all.

The current rate for gadgets exploding on planes is about one every four months, says a former NTSB dude. Which isn’t so bad, considering there are millions of flights happening in that time period. Still, I have the feeling this xkcd comic is going to stay funny for the reasons it’s funny now for like another year, max. [NYT]

The way you’d use the reNEW charger is simple. You toss your batteries in the top portion and they’ll be ready at the bottom once they’re fully-charged. Cool idea, but I’m not entirely sure that I’d want to plaster my windows with it. [Yanko Design]