Bring dead batteries back to life with just a spoonful of salt

Prepare the saline solution
Heat 150 ml of water , then add a tablespoon of salt . Mix until completely dissolved .

Soak the batteries
Dip the discharged batteries into the solution. Stir gently to ensure that the salt is evenly distributed over the entire surface.

Let it act
Wait 15 to 20 minutes for the solution to take effect and reactivate the battery’s internal components .

Dry thoroughly
Remove the batteries and wipe them thoroughly with paper towels. Any traces of moisture must be removed to prevent oxidation .

Test the batteries
Put them back into your device and check if they work again !

Does this method work on all batteries?

The salt and hot water trick is particularly effective for classic alkaline batteries (type AA, AAA ) and some button cells .
On the other hand, it is useless for rechargeable or lithium-ion batteries , which require specific methods to be regenerated.