Yep, and I understood that when I purchased and used the USB adapters. Even so, I'll admit to momentary shock when the low battery warning popped up while my N800 was charging.

Also, according to the fine folks at DealExtreme, the USB power adapter I purchased supplies 1000mA. I suspect that's not actually true, and let me tell you, it's disappointing that in this day and age we can't put our full trust in a web-based outfit that sells tech products of questionable origin at ridiculously low prices that include shipping all the way from Hong Kong.