Patent ID: 9660469
Date: 2017-05-23
CPC Classifications: H02J

Claim:
1. A multi-battery charging circuit applied in an electronic apparatus for charging at least two batteries, the multi-battery charging circuit comprising: an electric power detecting unit configured to detect a remaining amount of electric power of each battery; a charging deciding unit provided with a first amount of electric power threshold and configured to compare the remaining amount of electric power of each battery detected by the electric power detecting unit, wherein the charging deciding unit is operable to charge the batteries when the remaining amount of electric power of the batteries as detected is less than or equal to the first amount of electric power threshold; and a charging unit provided with a second amount of electric power threshold and a third amount of electric power threshold and configured to charge the batteries, wherein the charging unit is operable to charge the batteries with a first strategy in a first time period, to charge the batteries with a second strategy in a second time period when the remaining amount of electric power of one or more of the batteries is equal to the second amount of electric power threshold, and to charge the batteries with a third strategy in a third time period when the remaining amount of electric power of one or more of the batteries is equal to the third amount of electric power threshold, the first time period, the second time period and the third time period being successive time periods.