If your battery can not charge with our battery charger
(1). Remove your charger from the DC adapter.
(2). There are two hooks at the bottom of the charger.
(3). Your can release the top charging plate by pushing the hooks with two fingers.
(4). The top charging plate will release from the top.
(5). At the bottom of the charging plate, there will be three metallic contacts.
(6). Try pulling all the contacts so that it will avoid the bad connection.
(7). Slowly re-insert the charging plate to the charging base.
(8). Re-connect the DC adapter and your charger should work.
Good luck and if there is still other problem, please don't hesitate to send us a mail again.
AC Adapter for Apple MacBook Pro 15" MC373ZP/A,Precision Aluminum Unibody,
Battery for Canon PowerShot SD700 IS,SD790 IS,SD890 IS,SD900,SX200 IS,NB-5L