On Wed, 9 Nov 2016 01:09:24 +0000
Bill Wright wrote:

You've done the customary simple test to make sure it is the battery
and not the charging circuity? Checked the battery terminals are
clean and tight? Checked the battery water (if not sealed)?

If it started the car on Saturday, but wouldn't on Tuesday, then I
agree that I would suspect the charging circuit rather than the battery.

--
Davey.