DarkWare has released Battery Acid, a VST effect plug-in for Windows that was inspired by a deteriorated car battery!
Battery Acid uses a set of dual bitcrushers and waveshapers to completely erode your music to "delightful dilapidation". Each stereo channel can be crushed and mutilated individually. You can "dissolve" and "melt" as well as "corrode" and "erode", plus you can set the cutoff and resonance.
Battery Acid costs $10 and a demo version is available.