It will work in any lead acid battery. Boat, motorcycle or car. So I assume a tractor battery also.
It will active with the acid. No charger needed.
Not to my knowledge. Most recycle centers will and they should pay you as well.
I thought it was offered as a standard offering where ever basement watchdog sump pump was being sold as this product is right next to it.
No. It is minimally charged upon adding acid.
No, take battery to auto parts store to be checked, have you tried to charge it with a battery charger ?
mixed with water to specific gravity of about 1.25
Specific Gravity 1.058-1.409 @ 60°F
Acid will last forever in the sealed container. After it is opened, the water will evaporate. If this happens distilled water to dilute back to correct concentration.