Acer N321

Been using my shiney new N321 for about a week now, and am generally very happy with it - particularly the crystal clear VGA screen. More than slightly disappointed by the battery though. Seems to last only a couple of hours (and that's with the backlight only two levels above being off completely!) and takes at least 4 hours to recharge.

Anyone know if this is standard for this device or should I be getting better? Are there significantly extended batteries available? I've found one, but at only 1350maH it's not much more powerful than the 1200 supplied.

Thanks