3 of 3 people found the following review helpful.

Best Battery Accessory You Can Buy

My dad started using the washers 30+ years ago back when the packaging was a metal screw top and I've continued to put them on every battery we've worked on and I've never had a corrosion issue. I'm well into my 4 can of 50 so maybe 80+ batteries I've put them on. Marine, Farm, Lawn & Garden, Truck, Car, Top or Side post, Family, Neighbors, never seen one develop corrosion after they're installed. They last longer than the batteries do, I've reused them in a pinch without issue. These are not the red/green blister pack felt washers you see at the parts stores. They are a dark maroon color and they are impregnated with a greasy red colored chemical. Pair it with the NCP-2 spray on the terminal and the battery is totally protected against corrosion for the life of the battery.

Yes, I recommend this product.