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A league can also be a unit of area, used to express the area of land, that is equal to 25 million square varas. A (square) league is equivalent to about 4,428.4 acres (1,792.11 ha). It was used in the archaic system of old Spanish land grants affecting Texas and parts of adjoining states and this use of league is used throughout the Texas ...
DC-to-DC converters are used in portable electronic devices such as cellular phones and laptop computers, which are supplied with power from batteries primarily. Such electronic devices often contain several sub-circuits, each with its own voltage level requirement different from that supplied by the battery or an external supply (sometimes higher or lower than the supply voltage).