H - Electricity – 02 – J
Patent
H - Electricity
02
J
H02J 7/10 (2006.01) H02J 7/00 (2006.01) H04B 1/56 (2006.01) H04B 1/16 (2006.01) H04B 1/44 (2006.01)
Patent
CA 2149204
According to a first aspect of the invention, a portable electronic device has at least two load circuits which are independently powered by different batteries. According to a second aspect of the invention, the load circuits are powered by the same battery, but their power lines are branched from a node located close to the battery, thereby reducing common impedance. According to a third aspect of the invention, two power lines are coupled through switches to two independent batteries, and are mutually coupled through a third switch. The switches are controlled according to the discharge states of the batteries. According to a fourth aspect of the invention, a battery charger charges two or more batteries by supplying current to them for short intervals in turn, so that all batteries reach full charge at substantially the same time.
Nakanishi Eiichi
Onodera Tetsuo
Oki Electric Industry Co. Ltd.
Ridout & Maybee Llp
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