Description : it is common form was introduced for early Tansistor radious. It has a rectangular prism shape with rounded edges and a polarized snap connector at the top.
- The most common form of nine-volt battery is commonly called the transistor battery, introduced for the early transistor radios.
- This is a rectangular prism shape with rounded edges and a polarized snap connector at the top.
- This type is commonly used in pocket radios, smoke detectors, carbon monoxide detectors, guitar effect units, electro-acoustic guitars and radio-controlled vehicle controllers.
- They are also used as backup power to keep the time in certain electronic clocks.
This format is commonly available in primary carbon-zinc form .
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