If you are looking for the Alkaline Batteries from Energizer, you may see a feature named Power Seal Technology.
Confirmed by Energizer, this technology is referring to the power leakage. That means that after a certain amount of time in storage, the batteries will slowly lose their charge.
They are not referring to any liquid leakage. These batteries are sealed. If they are not damaged, there would be no worry about liquid leakage.