If your battery is not currently harmed irreparable (analysis less than 10 volts on the voltmeter), Epsom salt will revive it. However, it's essential to take all the necessary precautions to prevent crashes. Sodium bicarbonate will neutralize the battery acid in either case, permitting you to take care of it https://waylonmlfas.blogkoo.com/the-war-against-epsom-salt-battery-myth-54370645