Today I have by accident thrown a AAA battery into a bucket of water. I fished it out of the water immediately (within 20 seconds or so) and nothing notable had happened and the battery is still full according to a battery test device.
Cats Scratching Ears with Parasites. If this is not the issue, then it may be related to parasites alone. Check your cat's ears for signs of ticks, fleas, and mites. These parasites can cause obsessive scratching, as the cat makes a desperate effort to relieve pain and discomfort. If your cat is not allergic, try using natural tick or flea repellents (or mite repellent) if that seems to be the issue.
Cat Scratch Disease in Children. Cat scratch disease is an illness that can occur after being bitten or scratched by a cat. It is caused when the Bartonella henselae bacteria carried by cats gets under the skin in a human. Cats, and especially kittens, become infected with the cat scratch bacteria from fleas. But, fleas probably do not spread the bacteria to humans. Cats that are carrying the bacteria don't get sick and don't need to be treated. Cat scratch disease often goes away on its own in 2 to 4 months.