A charging apparatus comprising: a charging management circuit configured to manage a charging process of a battery to: charge the battery in a constant current stage until a voltage of the battery reaches a first voltage, wherein the first voltage is a charging cut-off voltage corresponding to the constant current stage; and in response to the voltage of the battery reaching the first voltage, charge the battery by applying, in a constant voltage stage, a second voltage to the battery, wherein the second voltage is lower than the first voltage; wherein the charging process of the battery comprises at least two constant current-constant voltage stages, and each of the at least two constant current-constant voltage stages comprises one constant current stage and one constant voltage stage; and wherein the at least two constant current-constant voltage stages comprise a third constant current-constant voltage stage and a fourth constant current-constant voltage stage, the fourth constant current-constant voltage stage occurs after the third constant current-constant voltage stage, a voltage difference between a charging cut-off voltage corresponding to a constant current stage of the third constant current-constant voltage stage and a charging voltage corresponding to a constant voltage stage of the third constant current-constant voltage stage is △V 1 , and a voltage difference between a charging cut-off voltage corresponding to a constant current stage of the fourth constant current-constant voltage stage and a charging voltage corresponding to a constant voltage stage of the fourth constant current-constant voltage stage is △V 2 , wherein △V 1 > △V 2 . a charging management circuit configured to manage a charging process of a battery to: charge the battery in a constant current stage until a voltage of the battery reaches a first voltage, wherein the first voltage is a charging cut-off voltage corresponding to the constant current stage; and in response to the voltage of the battery reaching the first voltage, charge the battery by applying, in a constant voltage stage, a second voltage to the battery, wherein the second voltage is lower than the first voltage; charge the battery in a constant current stage until a voltage of the battery reaches a first voltage, wherein the first voltage is a charging cut-off voltage corresponding to the constant current stage; and in response to the voltage of the battery reaching the first voltage, charge the battery by applying, in a constant voltage stage, a second voltage to the battery, wherein the second voltage is lower than the first voltage; wherein the charging process of the battery comprises at least two constant current-constant voltage stages, and each of the at least two constant current-constant voltage stages comprises one constant current stage and one constant voltage stage; and wherein the at least two constant current-constant voltage stages comprise a third constant current-constant voltage stage and a fourth constant current-constant voltage stage, the fourth constant current-constant voltage stage occurs after the third constant current-constant voltage stage, a voltage difference between a charging cut-off voltage corresponding to a constant current stage of the third constant current-constant voltage stage and a charging voltage corresponding to a constant voltage stage of the third constant current-constant voltage stage is △V 1 , and a voltage difference between a charging cut-off voltage corresponding to a constant current stage of the fourth constant current-constant voltage stage and a charging voltage corresponding to a constant voltage stage of the fourth constant current-constant voltage stage is △V 2 , wherein △V 1 > △V 2 . <EOS>