THanks all for the suggestions so far
In an attempt to shed more light on the problem I left it with no content fully shut down and it depleted the battery in 4 days.
So to rule out a dud new battery I put a digital meter in line with the -ve lead. That is showing a continual drain whilst in full Shut-down of 5.63Ma which equates with the 4 day run down of the new battery ( a 700Mah as I could not find a replacement 1000Mah anywhere).
I believe in shut-down the battery should last many weeks / months. My 650 goes for months unused with very little drop.
So my old battery was probably OK.
I will leave it with the battery fully charged but disconnected to confirm there is no voltage drop over a few days.
Then I will try deleting the .db file to see if that helps.