Patent ID: 7388352
Filing Date: 2008-06-17
Classification: H02J

Abstract:
1. A charger comprising: a single current source; two or more separate charging ports; a controller configured to determine, for each of two or more rechargeable batteries coupled respectively to the two or more ports, an amount of charge required to fully charge the respective battery based on a charge in the respective battery, and a charging current in proportion to the amount of charge required to fully charge the respective battery such that each of the two or more rechargeable batteries will reach a fully charged state at substantially the same time; and a current allocator configured to allocate the charging currents from the single current source to the two or more ports, wherein the current allocator allocates the charging currents in proportion to the amount of charge required to fully charge each of the two or more rechargeable batteries coupled respectively to the two or more ports such that each of respectively more rechargeable batteries will reach a fully charged state at substantially the same time.