I have the Iliad V1 but was very disappointed with the battery life. Also, I happened to buy it during the period where there was promise of free upgrade but after signing up I found out several months later my purchase date was a month outside their arbitrary qualification window. So finally my warranty has expired and I decided to go ahead and put in some new batteries.
Previously I was getting 5-6 hours with active use and digitizer once in a while. After the latest software update 2.12 I did notice that the battery life improved considerably as well as being more peppy. However, it was still not enough for my 12-18 hour workdays especially since I needed it on all the time for quick access due to the absence of suspend/hibernate.
In any case, I installed two 1800 mAh batteries:
http://www.batteryspace.com/index.as...OD&ProdID=2619
All it took was some shaving of the plastic that held in the original batteries to allow for a larger battery. These batteries are actually thinner but push the limit on height and width. Double-stick taped the backs to the cover for stability. I then soldered it to the power management board. Flipped the board down in place. Insulated the exposed leads with some clear tape and put the cover back on. And voila, it works! For much less than the price of upgrading the battery through irex, I now have 3600 mAh. I think the original iliad had 1100 mAh?? Or is this the new version. The new batteries are not significantly heavier. Total weight is 80 g vs 55 for the original v1 batteries.
First test after a full charge with ~200 page turns, 5 on/off cycles and digitizer active the whole time was 21 hours. I am now trying to see how long the iliad will stay on without the digitizer and some minimal use as I would normally have it.
Either way, this is now much better and totally fits my daily needs. Just thought I would share. Upgrade your batteries at your own risk though.
Thanks!