The D250 comes witha 2200 mah battery. A 3 cell Li-Ion version, good for over 2 hours. Quite an achievement for such a battery and netbook.  There is a version with a 4400 mah but the price differencee is well over 70 euro, I paid 279 euro (delivered at home, www.modern.nl)  for my D250. And this will give 5 hours max runtime. And this may not be enough also . 2 hours are passing by quickly on the road. And batteries age, so in less than 2 years I would not be surprised to see it only last 1 1/2 hours.

Lucklily there is a large after market offer of (non-Acer) of batteries on the market. I looked around for a big one, and saw prices well over 100 euro for 4400 mah. Or cheap ones from dealextreme but with bad reviews.

So I choose an affordable and reliable UK based source, from amazon.co.uk. A firm called Ultimate addons sells a 6600 mah battery for the D250 (fit for many other Acer netbooks also). It has good recviews. Price is 48.99 pound, shipping 7.99. With the current exchange rate this is cheap!
Fast delivery  also,  four working days.

Here you s ee the original 2200 mah in the front and the 6600 mah connected to the netbook. Perfect fit, and,  with its large size on the bottom, elevates the netbook in a more comfortable position.
Windows tells me the running time is nearly 9 hours! With the original and the addon battery I have now enough running time for even the longest trips.  I had it running for more than 5 hours, displaying a video, and Wndows kept telling me about several hours running time left. Looks good sofar.

Enjoying my Acer Aspire One with XP! But Windows 7 is the way of the future, so I am tempted to upgrade, once I have a permanent W7 license for it. 

EIT november 1st 2009: Windows 7 is now isntalled, read here)

I am studying how to protect the D2D eRecovery facility. At boot time all Acers Aspire notebooks  have a D2D (disk 2 disk) restore facility, activated by pressing ALT-F10 at boot time. It works by having a special MBR and a hidden partition of 7 GB with a fresh OEM XP install.
Installing Windows 7 will for sure change the MBR and prevent the recovery process.

This is what I have found and done sofar. No Windows 7 installation done yet, need a RTM version with a valid key. Hope to get one at Teched in november!

1. Created the recovery dvd’s. I have an external usb dvd writer, a big brick one, not for the road but usable for these kind of tasks at home)
   I got the PTEDIT32 utility and set the partition entry type for the first, hidden,partition to 07 (was 12)     After booting Windows XP the before hidden PQSERVICE partition appears as drive D:, 7 GB    Made a backup of that partition (about 6 GB. And yes, I used explorer for the copy after making sure it shows hidden+system files
2. Did the same (just to check how it works) before using ptedit32 with ubuntu and knoppix live cd. Works fine with knoppix,  the PQSERVICE can be mounted with a click on the drive on the desktop. No surprises either, same files.    
   Except for the wireless, a known problem, all seems to work fine with both Linux’es.
3. Searched the PQSERVICE for the utility and file to restore the MBR and no luck. Nothing that  even vaquely resembles that can be found.
4. Used a disk editor (http://jawade.nl/) to see the first block, which is the mbr, and yes, it is an MBR as far as I can see.
5. Used a small utility to make a backup of the mbr (http://mbrwizard.com/) to file, so now I have the equivalent  of the missing     Acer supplied utility, I can restore the mbr with that utility.
6. The forementioned Knoppix  and Ubunty live cd’s contain the partition editor (GPARTED), so I can create a  new partition for Windows 7 and have a dual boot system.

I hope I now have everything in backup to start the Windows 7 installation.

 Or do you see a snag I forget?  Oh well,  I will also do a disk clone before further experiments.

I have been thinking about it some time now,  what to take as computing device on the road.
When I am traveling my faithful Ipaq (4350) serves me well, since 2006. Playing mp3, watching video, it all went well. Accessing internet via wireless if available. And will do so in the future, good in the airplane or train or bus for music and movies. With three batteries I can fill several hours,
It is old by current  standards,  and replacement by a modern pda will be  expensive, since they became smart phones like Windows Mobile or Android based.

But a pda/smartphone could not offer me the support I need for my kind of usage and as complement to the electronic devices  I take along on my travels. A simple digital photo camera has changed into a Canon 710IS and now a Canon 1000D dslr. Video has changed from a mini-dv type to a flash based Canon FS100. And all these equipment, from Ipaq to photoo and video have something in common: SD flash cards. The amount and size grows each year, for music, and photo and video files. Nice to save a copy on a hard disk and do some editing early. And store fresh music and movies on the Ipaq.

Another missing feature was true internet access. Wireless, and better fixed ethernet. And a modern browser is better, many sites fail at the limited browser of the Ipaq.
One cant program on the Ipaq. My work on Pascal in Delphi for example,  often the opportunity is there, the tool is not.

The alternative is taking a fullsize notebook. I did so in 2007 to Venezuela, and again in april 2009 to Berlin.  A bit heavy and bulky to be honest, but what a luxury.

The solution is available, and has now become affordable:  a netbook. I choose the Acer Aspire One D250. The lower price model, it will not be  the day to day working horse.  Small, 10 inch display, 1024×600 resolution. Capable cpu,  like most netbooks it has an Intel Atom N270, 160 GB hard disk, wirelles, ethernet, vga connector and ofcourse a SD slot (SDHC accepted). Audio out,  microphone in, webcam. 3x USB.  Windows XP home.  Small! 3 cell battery, so I wont expect it to last over 2 or 3 hours.

The Acer next to the DELL Latitude D820.
I did change the 1 GB memory to a 2 GB module. I found this makes apps on XP run better and it will be right for Windows 7 in the future.

What I found installing all my favorites:

- XP is XP. Quite boring actually, just supports every aspect of this PC. Wireless works without a glitch, second monitor (1280×1024) functions fine, sound from internal speakers is ok, and via headphones it is good. Reading and writing SD cards is fast and painless.

XP home, all my other installations are Professional. So simpler file sharing,w which is mfine,  and no remote desktop! VNC comes to the rescue, but I do miss RDP. 

The keyboard is small but easy to type on. The touchpad and mouse keys are small also, but work fine. It is the display where the netbook really shows its limitations. It is bright, easy to read, though small in size. The resolution is a problem for some applications, they just expect 1024×768 as a minimum and cant be resized smaller. That is against the Windows UI rules, but Adobe seems not to care

Everything I have thrown on it works:
- Adobe photoshop 7. Does expect a height of 768 and refuses to resize to 600. The work area is visible and editing is fine.
- Adobe Premiere Elements 7. No problem here, video plays smoothly.
- GOM Player, VLC player, Winamp. The divx movies show fine. The screen really works well for video. Big improvement on the Ipaq.
-  It is just boring old XP, everything works fine. I have seen Adobe products being confused by resolutions on other machines too, so thats nothing new.
- The CPU and 2 GB memory make it a workable machine.  Ofcourse  in classic mode and optimal display settings for performance!
- Acer did try to pollute the machine with unnnecessary gimmicks,  , so uninstalling garbage took some time.

I am sure that the full functionality, the  low weight and small size and acceptable perfomance will make it a pleasure to take this machine along on the road!