Balancing circuit for charge storage elements

There is disclosed a charge balancing circuit (CBC) and method (10, 20) for balancing charge storage elements (CSE1_1, CSE1_2, CSE2_2) of a charge storage device (CSD). The charge storage device comprises at least two series connected chains (CHN1, CHN2) of charge storage elements. The charge balancing circuit (CBC) connects a first charge storage element (CSE1_1) of a first chain (CHN1) in parallel with a first charge storage element (CSE1_2) of a second chain (CHN2) during a first period of time (Φ1), and connects the first charge storage element (CSE1_1) of the first chain (CHN1) in parallel with a second charge storage element (CSE2_2) of the second chain (CHN2) during a second period of time (Φ2).