Did you know, dead dry battery cell can revive with our household ingredients.  First all you need water, salt, cup and dead dry cell battery. You need to make some vertical holes 4-6 holes is enough.  Mix the salt and water on cup, 10 tablespoon of water then 5 tablespoon of salt is enough after that mix it then soak the dead dry cell battery  in the  watersalt mixture for 1-3 minutes. This method will last until the manganese is wet.  or you can repeat the process.