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Is 3.90 fluid drams (ʒ) as heavy as a Battery (C)?

It's about one-fourth as heavy as a Battery (C)
The weight of a Battery (C) is about 17 fluid drams (ʒ).
(Alkaline)
A "C" size battery weighs 17 fluid drams (ʒ). C batteries are typically used in medium-drain devices such as musical instruments.
There's more! See other comparisons to 3.90 fluid drams (ʒ)...