Yes, I heard that battery pack charger works too, although I haven't tried it myself (yet).
The problem with some of these adapter chargers is they don't tell you the mah in the advertisement so it's hard to tell what you're getting.
It's funny that I was using a cheapo 801 usb passthrough from bestecig.com when I joined this forum. It was my first device. I went on a mission to find something to work with it so I could power it at work and in my car. Nobody really had much info on them then so I was pretty much forced to try different things on my own.
Dnakr finally provided me with links to a car charger and wall charger that seemed to work, I purchased both of them and found they really do work.
Now puresmoker is selling the usb passthroughs and they're a hot item and
everybody is coming up with powering suggestions. Go figure!
In any event, I really don't want to speak for the 901 because I don't know if something different might work for them. But I
definitely know about the 801's
Lu