Stop Start working intermittently

[RogerWill]

See this:

https://www.manualslib.com/manual/778841...ml?page=47

Long story previously told, but agave 2 year old Berlingo 130D Flair 1st 18 months stop start worked in total about 1 month.Contacted Citroën UK advised to see another dealer Fareham (bought and after 8 visits to Farlington Portsmouth dealership, where I bought the car new).Citroën advised likely they will change battery,in the end NO FAULT FOUND. 
However Citroën and garage advised the technicalities,dealer advised regular charging battery with a 4hr delay post charge.Citroen explained the theory of how the battery has been exhausted from start up and advised the likely 2hrs to get back full capacity.
The reality is/was that using a 1A charger, within 30/40 minutes the charger was trickling 100mA- SO clearly not charge system.
Anyway post dealer assessment the S/S worked consistently four a month Feb 21 to Mwrch 21,then stopped working.
Mid May upon driving home at 5pm in the dark,13C outside temp and very heavy rain,air con on to demist the windows,fan automatically high speed,front and rear wipers flat our rear window heater on.
The S/S started working,its now 20th July and S/S is still working.
The only difference is the cab temperature is set at 20C not 21C as I have always set my cars.
Actually took my car for 2nd service today dealer advised how this is what he has found with Citroën.
Really odd,my wife has a 3 year old Seat Ibeza S/S works ALWAYS the minute you are off the drive.
Not good is it.
I would be intrigued to know if those who have replaced their batteries have completely illiminated the problem!