Hey Gray, did you figure out the problem? I dropped mine this morning and the blue LED stayed on, no more battery action. Figured it was belly up for the battery, even though it only fell about a foot from my lap to the floor.
Hi Liz. I think I figured out the problem, but I don't think I can fix it. I say that having indeed fixed a 901 bat with my soldering iron.
What happened to my batt (I believe) was that the battery(The internal battery that is, your 'batt' has a batt and other stuff in it,) shifted position inside. It's held in there by friction and maybe something sticky. When it took the hit, the battery was shaken loose.
Along the sides of the battery are wires. These wires run forward to the LED, and also connect the battery to the button and to the atomizer connector.
The shifting of the battery caused the wires to be removed from their proper places. Now, I think I could fix the wires, if I knew for certain where they go, and if I could reach the internal parts. As things stand, I have the parts in a small box to give it a try later, but for the 15 or so bucks, I rather doubt it's worth the trouble. The main issue is getting to the internal bits of the outer casing, since much of the work seems like it needs to be done at the still closed end of the tube. (The atomizer end.)
I'll need to find a way to get that end open without wrecking it to fix this battery.