I bought a likwaiw (/Cameron Sino/Xell) battery for my N800 based on the advice in this thread. I just got it this week and it seems to be working just fine. It's only 1330 mAh compared to the 1500 mAh of the Nokia battery, but it seems to be well worth the $8. It's definitely better than the 1/2-hour life of my 3-year-old original battery .