FIELD: electricity.
SUBSTANCE: use: in electrical engineering for secondary battery recharging. Portable electronic system comprises primary and secondary devices, wherein primary device has first battery based on lithium-cobalt oxide, and secondary device has second battery based on lithium-iron phosphate or lithium titanate. At that, primary and secondary devices are configured to provide second battery recharging from first battery at rate of 2C-16C. Device also includes voltage regulator and microprocessor to control voltage regulator to supply first charging voltage. At that, after first charging voltage reaches preset level, determining internal resistance of charging circuit and limiting first charging voltage, supplied by voltage regulator, with maximum charging voltage, based on second battery determined internal resistance and characteristics.
EFFECT: increasing recharging speed and reliability.
13 cl, 10 dwg
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