I've had my N800 for about 2 weeks and have been very impressed by the battery life. Obviously your mileage will vary depending on your particular usage patterns - what you are doing and how much time the screen is turned on (and the brightness). My guess is that the screen is the biggest power drain, so watching movies would be a good stress test, but since I don't care about movies it doesn't matter at all to me. In my case I've left it on the table next to me running claws-email, skype, pidgin and the mozilla browser for a good part of the day, and most of the next day before needing a charge. During that time I browsed for and installed a few other programs and did occasional news reading online. And having skype and jabber conversations plus about 20-30 e-mails each day. So in my particular case right now I feel pretty comfortable replacing my notebook with the N800 on an overnight business trip without worrying about the battery. There are three things I take with me on trips for "power management." The first two are not N800 specific: 1) spare battery with USB connectors for both charging and power output. I use these from APC, but there are others. They can power/recharge my cell phone, iPods, and other devices including my N800: http://www.apc.com/resource/include/...base_sku=UPB10 2) a USB (output) charger. The one I like is called the musicPower Duet because it has two USB ports for charging two devices at once. Mostly I use this for recharging my phone and the APC battery (#1 above) overnight. I'm not sure who makes it because there's no manufacturer's name on the device, but here's a link to the WalMart web site with a good picture and cheap price: http://www.walmart.com/catalog/produ...uct_id=5750794 3) Just yesterday I got a Nokia USB power cable in the mail. The Nokia part number is CA-100. It has a USB port on one end and the N800 power connector on the other end of a short wire. Besides letting me run the N800 off the APC battery when I need the extra power, it saves me the trouble of carrying the (stupid) N800 charger around. This little wire fits in the pocket of the case I got for my N800 (it's really a Nintendo DS lite case). The wire is about $20 at Amazon: http://www.amazon.com/o/ASIN/B000QGF...pf_rd_i=507846 Hope that helps you decide. The N800 has been great for me.