battery drain problems

saab aero auto convertible 2004 new battery fitted after 1 week goes flat overnight alternator checked fine right charging ampage fine when starting in
morning no radio no indicator warning noise or hood bleep when shut if I disconnect earth lead on battery and put back on it works is this causing the battery drain any ideas please
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.