At 1408hrs a boat reported 1nm North of the Raurimus with a flat battery, requesting assistance.  5 POB.  Sea conditions were good with no swell and a 6kt wind from the NE.  An All Stations call resulted in a boat offering help.  The vessel was taken under tow and both boats arrived safely back in the harbour at 1600hrs.  A big thank you to the Good Samaritan.