Not sure where all this "cooler will hammer a battery/change the cooler"
crap stuff is coming from ...
I'm assuming
![Smiley Smiley](https://images.omegaowners.com/forum/yabbfiles250/Templates/Forum/default/smiley.gif)
that
geoffr70 wrote on 08. Sep 2011 at 21:21:
......... After a 100 mile blast to Keswick wiith the 'van, lights, radio, and 12v cooler box on it just about started when I got there. ...........
means the engine was running, thus the alternator was in the "operating" mode thus should have been supplying electrickery ????
As said before... nowt to do with the cooler .. lots to do with the charging circuit .......