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57 fluid drams (ʒ) is about one-and-two-thirds times as heavy as a Battery (D).
In other words, the weight of a Battery (D) is 0.610 times that amount.
A "D" size battery weighs 34.70 fluid drams (ʒ). The D size battery is the oldest of the modern battery sizes, first invented by the National Carbon Company in 1898.
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