The No. 1 battery is a standard flat-head battery, denoted by D, called a D-type battery, also known as a large battery.
Model D is No. 1 battery, which is widely used in civil and military industries. D-type batteries can be found in special DC power supplies. The height of the standard D (flat head) battery is 59.0±0.5mm and the diameter is 32.3±0.2mm.
A D-type...
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