As promised, I spread a manual restore of the old battery that you throw together. After all, so you have to deal with them? And, well, still pass them in the metal or in the store for 500 rubles, but the chances to serve for some more time he has, schA everything will be.
There will not be a question of the Soviet method, reverse charging, that is, the change of poles and their return, change of electrolyte, etc., etc., and something new for you.
So, run quickly to any pharmacy and buy magnesium sulfate, aka Epsom salt, aka American salt.
The thing is cheap,but it helps!
Unscrew the plugs on the battery, unless of course it is serviced, if not-to the landfill. And by the way, it should not be damaged, the body, and the same should not be closed and showered plate. We grab a syringe, which we bought in the pharmacy, we pump out the old electrolyte exactly half, that is, 50% of the old electrolyte should remain in the banks.
Now direct the solution. Pour hot distilled water into the container, in the eggplant for example, gradually pour the powder and stir, a lot you do not fall asleep, it will cease to dissolve. Are you all ready? Start the process. Pour the resulting solution into the battery, pour as a normal electrolyte, that the plates were completely hidden, well, a couple of centimeters above. As filled, put battery on charge, waiting for a full cycle.
After that it is necessary to pour out all liquid from the accumulator and to fill in a fresh electrolyte and to bring density to 1,27.
Yes, by the way, what it is and how it works. Yes simply, as a result of an unknown chemical reaction, the solution eliminates lead plates from sulfation. You know what? That's why the battery ceases to hold charge and discharges quickly.
As a result of these manipulations, the capacity will rise to 70-85% of the capacity of the new battery. If the effect is not special, the procedure is repeatable, can be repeated 3-5 times, no longer make sense.