yes but what I do not comment is that it is not a car battery is an amplifier rechargeable gel battery is completely dry is square like that of cars and I think I have to add acid the issue is the percentage between water and acid I filled it with distilled water but I do not know how to generate the acid and also charge it with the car battery charger does not generate the acid for that?
Every battery has a time of use, no matter how much you charge acid and distilled water, it doesn't even go back. How long is that battery?
Celentauro is right it is difficult to revive a battery, and even if it is not a car it is the same as it is lead-acid.
See if you remove the plugs you can see in the background some stones is the sulfate generated, those stones must be undone which is delayed and complicated, the battery has a sheets that become thin over time and become unusable or short-circuited, in the spare parts American rias for cars sell you the acid already prepared test with that one and measure with multimeter the voltage of each cell but see if they are short or if they do not take charge