However, the reality is, clock speeds and battery life are closely related...
Raise the clock speed, and you drastically increase the power requirements.
Tell me, how long does a current generation Iphone's battery last when doing demanding 3D graphics?
This has often been a fatal weakness of Nintendo's handheld competitors, so I suspect they're keen to avoid copying their competitor's mistakes...
As for battery life, I'd take power over longevity any day, since opportunities abound to charge whatever handheld device I choose to bring with me.
Ah. Now here I may be in the minority, but I find it a major nuisance.
Having a digital video camera with a battery life of about 1 hour, a laptop, which when running at full power lasts only 1.5 hours, and several other devices,
I can't agree with the idea that easy access to charging opertunities is a given.
Then again, I have made 8-14 hour journeys on average 4-6 times a year, and ones twice that long, all with little or no prospect of recharging a device along the way.
(and even with my camera, there's rarely a chance to recharge it when it's actually being use., so I've resorted to buying lots of spare batteries for it.)
From that experience, I know that anything less than 8 hours of use between recharges is a serious headache.
4 is about the minimum if you can easily get to a recharging location. (This is about what my laptop did when new, if I turned everything down to minimum performance. - And it was about sufficient to make a short trip somewhere and watch a dvd, or do a little bit of work.
But it soon led to a useless and heavy object in my bag.)
For longer trips, it's really annoying to have your battery run out. And doubly so if the device has a 'built-in' battery...
Back in the days when AA batteries in devices were common, you could just replace them.
It'd take about 1 minute.
Now, a lot of devices have batteries that cannot easily be removed, and are specialised (and thus, expensive, and difficult to find) just for that device.
As a result, having a flat battery now means finding a charging socket and being tied to that location for several hours.
I can give a simple comparison of the ocnsequences for me even with moving from my Game Boy Color, to the Game Boy Advance SP I replaced it with.
The Game boy color used 2 AA batteries. I used rechargable ones, but AA batteries are easy to get just about anywhere. - And a pair of AA alkalines lasted 29 hours in 1 test.
So, if the batteries ran out, I could get a new pair easily, and replace them within about 1 minute, then keep going. Even if I was in the middle of a journey.
You could argue about the cost of constant replacement batteries, but that's what rechargable AA's were made for. (I saw the Sony 'move' controller's website recently, and it boasted about it's built-in rechargable battery, compared to the Wii's AA's, and how this was somehow better - Well, a motion-sensitive controller cannot effectively be used with a cord attached.
And an in-shop demonstration made it blatantly clear that the 'move' controller could not be used while charging. I use rechargable AA's for my Wii remotes, and while it takes upwards of 18 hours to charge a pair, I can charge them will using a completely different pair for my remote... Thus, the supposed 'benefit', is actually an impediment.)
The game boy advance SP has a built-in rechargable lithium Ion battery. It's technically removable, but replacing it requires a screwdriver, and, an actual replacement battery, which is very hard to get hold of.
The battery life, in an ideal case is 14 hours, but drops to 8 if you have the backlight turned on.
Once the battery is flat, you need 3 hours to recharge it.
And since the device itself is the recharger, while you can use the device while it's recharging, you cannot move more than 2 meters from a power socket while you do so.
And on most journeys you'll have a hard time finding a socket. Let alone one you can afford to be in the vicinity of for several hours...
But, hey. What do I know right? Surely nobody else needs their 'portable' devices to actually, you know, be portable?
I would much prefer to get away from all these annoying modern devices with proprietary lithium Ion batteries.
Doubly so where the batteries aren't really removable without a big hassle involved.
But, since standardised rechargeable batteries that actually deliver decent battery life are pretty hard to make.
Not to mention that all these specialised batteries in devices these days are tailored to deliver voltages and currents that are quite specific to the device.
even so, it drives me nuts sometimes.
Anyway, sorry for the rant. But I just felt the need to point out that different people need different things.