There are 2 things that are done to flooded lead acid batteries to help maintain them:

Equalizing
Desulfation

I don't know which of these your charger is doing. Neither will "revive" a bad battery. You can google those terms and read tons about them. Mostly those techniques are used on deep cycle batteries and backup batteries. Car starting batteries generally do not need this done and do not benefit from it.

Car batteries need to have water added periodically to keep the plates submerged. Car batteries generally last as long as the warranty, as a rule of thumb. Car batteries need to be float charged if they are left unused for long periods. If they are sitting for long periods of several months then a desulfation system is not a bad idea and some of these are pretty cheap.

So the short answer is, if this is about the battery in your car, if it is shot then you need a new one.

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra