H - Electricity – 02 – J
Patent
H - Electricity
02
J
320/11, 320/2.5
H02J 7/10 (2006.01) H01M 10/44 (2006.01) H02J 7/00 (2006.01)
Patent
CA 2020384
A battery charger for a portable wireless telephone set comprising a rapidly charging circuit for rapidly charging the battery by a first charging current of a high level at a start of the charging operation, a tricklingly charging circuit for tricklingly charging the battery by a second charging current of a considerably low level, and a charge controller for making the tricklingly charging circuit take over the rapidly charging circuit after a charge detecting circuit detects that the battery is rapidly charged to its normal voltage. In order to avoid that the battery is insufficiently charged by the tricklingly charging circuit when the telephone set is left in a power-on condition, the battery charger further comprises another charging circuit for supplying a third charging current which is lower than the first charging current but higher than the second charging current. When the telephone set is in the power-on condition, the charge controller operates not the tricklingly charging circuit but the other charging circuit after the battery is rapidly charged to its normal voltage, so that the battery can be charged to the normal voltage even if the telephone set is left in the power-on condition.
Corporation Nec
Smart & Biggar
LandOfFree
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