Patent classifications
H
ELECTRICITY
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H01
ELECTRIC ELEMENTS
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H01M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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10/00
Secondary cells; Manufacture thereof
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H01M10/42
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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H01M10/48
Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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H01M10/482
for several batteries or cells simultaneously or sequentially
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