When people don't know the name of batteries, they simply say "flat batteries." This could be almost anything, but most often it's 3r12 or square, crowns and various tablet power sources.
Flat disc energy storage devices are made entirely of metal and have a distinctive sheen. They resemble a flattened round cylinder, a coin, a button, or a pill. They are tiny and often swallowed by children. Therefore, if you have a child in the house, be careful.
The voltage of these batteries ranges from 1.25 to 3 volts. The capacity can reach up to 200 mAh or so.
One of their representatives is LR 44.
Square current sources can also be called flat, but they are quite large. Their housing is made of plastic.
Inside you can find 3 elements of the type AAAwith a series connection. They produce a voltage of about 4.5 volts. They have found application in flashlights and radios, and can also be found in metal detectors.
Kronas are also suitable as flat current sources. These are specialized batteries with a voltage of 9 volts.
Despite this, they are quite small in size, slightly larger than a matchbox. They are used in radios, toys, alarm clocks, watches, and measuring instruments.
