hahahaha !! try try onli~ ;p
but can feel serius diff compare to 900Mhz ;p

got 1500mAh oh ??

It means u are outdated very simple.
Why will OC waste battery when u perform your task faster means less battery drain.
OC gives u more smoother and stable experience.

For your info if u know OC the processor doesnt always stay at max speed it only goes maximum when its necessary beside that it will go down to certain lower speed.

If u  OC and whole day it stays at 900mhz yes possible to spoil the hardware but the fact is it dont

my battery only last 1 and half day...if browsing internet can't reach a day...

stock batt from N900? 1 year?
The N900 hasn't 1 year yet, I think you mean the same battery model as N900?

It also depends on your usage and how you charge the battery; Frequent discharge will affect it's lifespan and performance.

What connection are you using which have such short batt life? If 3G, then it will really drain your battery fast and also heat up your battery. Then depends on what kind of website you surf, those flash websites or those take require much processing power will definitely drain more.
On GSM mode (2G/2.5G), it can last much more longer.
WiFi even more longer, but ever since I'm using titan's kernel v40, the WiFi seems to consume more power even on idle.

I know, but N900 was only officially released only around end of November or early December last year right?
In September 2009, if I remember correctly, there might be test models for developers or something.
Did you mean you got those units? Those units as I know, might have the USB port issue.

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Added on September 4, 2010, 10:06 pm

When they initially successfully overclock the N900, the voltage used was the same with 600Mhz and there was improvements on battery life as feedback by those that have OC. The logical explanation would be the task completed faster?
As for heat, the heat that we felt was from the battery; nobody actually knows the temperature or heat from the cpu itself. That's also what I've read; Actually, there're few devices running on same processor already OC long before N900.
The funny thing is how the initial reply from many people when someone suggested to overclock the N900. Moreover, the Droid/Milestone has been OC for months already when OC on N900 still on discussion whether it is possible. For the Android devices, they have very well built apps for OC.