Fast charging of NiCd and NiMH batteries

Pin-compatible ICs Type MAX712 and MAX 713 from Maxim are intended for fast charging of nickel-metal-hydride (NiMH) batteries: the MAX713 may also be used in nickel-cadmium (NiCd) battery chargers (see Table 1). In this table, C is the nominal capacity of the battery in Ah. Note that charging at currents >2 C should be undertaken[…]

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Automatic battery charger 1

The charger described switches off the charging voltage when the battery reaches its full nominal voltage and switches it on again when the battery voltage drops below a predetermined level. Part of the battery voltage is taken from across potential divider Ri-R2-R3-R4 and compared with a reference voltage in IC2b. As long as the battery[…]

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Battery charger

The battery charger shown in the diagram may be used to charge a battery, or batteries with a total nominal voltage of 12 V (that is, ten NiCd batteries or six 2-V lead-acid batteries. It is small enough to be built into a mains adapter case. Misuse is virtually impossible: batteries connected with incorrect polarity;[…]

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