Visit dell support website and follow any advice on discharging the battery or known issues. You may have gotten the battery so low, its not seen as an good battery or caused a bad cell to be found. Of course, if any warranty is present use it. Just follow what needed for battery details. The best way to test this is a another known good battery, got one. Otherwise, it won't recover until a true charge is going. I exclude bad contacts, check area, and any possible bad patch of batteries or possible bad AC power wart.
My Dell Studio1535 'hungs' while plugged in to power, I thought it was a software problem, but even after updating drivers it still hungs, please help.