1994 Jeep Cherokee 4×4

I just replaced the steering column in my 94 jeep cherokee 4×4, and somewhere in the process my brand new battery died. I left it plugged in on the negative side but disconnected the positive cable while I was working. After trying to start the car I tried jumping it, and the car just wouldn’t take any juice, lights stayed dim, etc. I checked all the connections to the column themselves; they were intact, did a brief check of the fuse box, everything looked good. I don’t have a DMM so I can’t test the battery myself, but I can’t see what would be wrong with it unless leaving the neg. cable connected for a while would drain/ruin it.