You checked your batteries and you have corrosion.

What do you do now?

One helpful battery corrosion remedy it is to use baking soda and water to neutralize and remove it.  Here’s an article from a few years back that walks you through the simple steps that will get your battery-powered items cleaned-up and running again.  Don’t have time to click on the link?  Well, here’s what you do:

For flashlight and other small electronic devices, first remove the batteries, then use a paper towel to gently wipe away light corrosion. Use two tablespoons of baking soda and a little water — just enough to form a paste. Apply the paste to the battery terminals, and the corrosion should foam up and go away. Wipe all the areas with a clean, damp cloth, and dry everything well.

All this only take a few minutes and costs only pennies per use.  Its a great way to save money, maintain equipment, and be ready.