I left it on the charger all night at the recovery menu. This morning, it still says battery low when I boot into fastboot. If I try to do a normal bootup, it sticks at the dual core screen and I don't think it's charging. I have a couple coworkers with Bionics, I'm going to see if I can borrow one to charge my battery.
EDIT: was able to use a coworker's battery. RSD still gets stuck at step 9/22, seems to sit there and do nothing. Trying on another computer.
EDIT 2: SUCCESS! I was able to get 902 to flash. Now to root and update to 905!