Rechargeable batteries. The new Nickel Metal Hydride (Ni MH) formula does not need to be fully discharged before recharging like the older NiCads did. The number on the label is like MPG on a car. The higher the number, the farther you go. Let’s say your AA battery is 2400 MA/h. That also means 1200 milliamps for 2 hours. If your radio takes 100 milliamps per hour to make music, doing the math, your batteries will supply 24 hours of music when fully charged. The charger pushes all the electrons to one side of a wall. This flow of pressure is what makes things happen in your appliance. This chemical process does wear out with time.
One application that will destroy the chemicals in a rechargeable battery is a hot wire. The rapid discharge boils the chemicals inside and they won’t charge anymore. The chargers are made to back off when the battery is full, so leaving it in for an extra day or two won’t hurt it. The smaller chargers have a circuit inside that creates noise on AM and FM radios that can travel through the extension cord.
