Did you do a search on this before posting? There are something like 2 to n power threads on this subject.
The short answer is no, its not compatible, at least not with the SAGERs. It doesn't have enough voltage and it doesn't have the right adaptor plug. The voltage (I believe its 19) is just a tad short so if you got the right plug, it might work but your charging times (already long) would be extended. Given the machine takes 14 volts to run and 20 from the AC adaptor, you could figure it would take an extra 20% longer to charge your batteries. Then again, you might just ruin your battery and burn up your machine.