If the battery shows less voltage or won't take a charge, it's time to get out the hydrometer. This device checks the proportions of sulfuric acid and water in the electrolyte, which is a precise indication of the level of charge.
Common causes of cat hair loss, or alopecia, can range from allergic reactions to hormone imbalances to an infestation of some pest or another. Although the different causes can be difficult to pinpoint, most are fairly easy to address and remedy.
Ear mites, scientifically known as Otodectes cynotes, can cause severe itching which leads to a loss of hair on the ears and head. These mites easily spread amongst cats, and will occasionally transfer onto people although they cannot survive on humans.