Properly a battery in which chromic acid is used as a depolarizer. It
includes the bichromate battery.

A battery in which bleaching powder is the excitant. The zinc electrode
is immersed in a strong solution of salt, the carbon in a porous vessel
is surrounded with fragments of carbon and is packed with chloride of
lime (bleaching powder). There is no action on open circuit. It has to
be hermetically sealed on account of the odor. [...]

A battery of the Bunsen type in which an acidulated solution of
potassium chlorate is used as depolarizer.

A battery used for heating a platinum wire or other conductor used for
cauterization in electro-therapeutics. The term is descriptive, not
generic.

A Daniell battery for whose porous cup a vessel or species of sack made
of parchment paper is substituted. The battery has been used for
electric light, and has been run for 200 successive hours, by replacing
every 24 hours part of the zinc sulphate solution by water.

A battery with carbon negative and amalgamated zinc positive electrodes.
The carbon is contained in a porous cup, packed with loose carbon.
Electropoion or other fluid of that type serves as excitant and
depolarizer, and is delivered as shown from cell to cell by syphons.

A modification of Grove’s battery. Platinized lead is used for the
negative plate, and as a depolarizer a mixture of 4 parts concentrated
sulphuric acid, 2 parts of nitric acid, and 2 parts of a saturated
solution of potassium nitrate.

A battery in which cadmium is the negative plate, sulphate of cadmium
solution the excitant and depolarizer, and zinc the positive plate.
Electro-motive force, .31 volt or about one third of a Daniell cell. It
is mounted like a gravity battery.

A two fluid porous cell battery. The negative plate is carbon, the
positive plate, amalgamated zinc. The depolarizer is nitric acid or
electropoion fluid, q.v., in which the carbon is immersed. The last
named depolarizer or some equivalent chromic acid depolarizing mixture
is now universally used.  The excitant is a dilute solution of sulphuric
acid. Originally the carbon was made [...]

A battery with amalgamated zinc and carbon plates, with an exciting
fluid composed of sulphuric acid, water, and potassium bichromate. For
formula of such solutions see Electropoion Fluid–Kookogey’s
Solution–Poggendorff’s Solution–Trouvé’s Solution–Delaurier’s
Solution, and others.