Wow 5 pages now and 1300+ views! I didn't expect this kind of response.
Anyway, I've been doing some research with the help of google...
It seems most battery tests say with the screen at full brightness they get about 3 hrs!
My experience is more like what the reviewer got in this test:
Here is a direct quote:
To put it bluntly, a 1150-mAh Lithium-Ion battery is just insufficient for a device with the parameters of the Asus A730. The device started asking for power unexpectedly soon when in normal operation. It was particularly noticeable when I tested the camera. The first battery test when the device played MP3 songs with the display turned off suggested that something is wrong - the battery lasted for 6 hours and 25 minutes. Some other devices are able to work that long with full backlight. The standard test when other devices last for 3-5 hours on average, was even worse. The 2 hours and 13 minutes is an embarrassing result which spoils the otherwise excellent performance. If you need more (I am sure you do), you can either buy a spare battery with the same capacity or a 1800-mAh one including a new rear part of the cover. As a bonus, the Asus offers an option to charge over the USB port, which may come handy.
I'm going to phone Asus to see what they say...
... as Arny says - "I'll be back."