2012 autobiography 3.0 sport,did long journey 90 miles headlights on for an hour before parking up yesterday,this morning battery totaly flat,called out my breakdown service jump started after initial boost charge fro recovery van,he's tested all things and can't find much wrong,battery only 12 mths old YUASA NOTHING WAS LEFT ON any advice appreciated mileage 48,000 THANKS.

I have a 2012MY 5.0 AB Supercharged and I fitted a new Yuasa battery about 10 months ago and it’s been flat 3 times in the last 2 months with zero reason apparent!! Which one did you fit? YBX 5019 silver? 2019 5.0 SC SVA (Current)
2012 5.0 SC AB. Sadly written off by a campervan
23 plate Focus ST (Current)
1942 VEP Ford GPW Jeep (Willys) (Current)
1943 Whites M16 Halftrack (Current)
16 plate Eurofighter Typhoon, 2 x Eurojet engines with 20,000lbs thrust each. 1380mph

After I have been called by the wife twice with a dead battery within the last month I fitted a Matson Battery Monitor

.

It does all of the below and for around 30UKP money well spent.

Well mine went again today. I charged it full a week ago last monday, I drove it to work and back on Sunday and then it was parked until yesterday when the wife moved it over on the drive. Today I went to it and it’s dead. 2019 5.0 SC SVA (Current)
2012 5.0 SC AB. Sadly written off by a campervan
23 plate Focus ST (Current)
1942 VEP Ford GPW Jeep (Willys) (Current)
1943 Whites M16 Halftrack (Current)
16 plate Eurofighter Typhoon, 2 x Eurojet engines with 20,000lbs thrust each. 1380mph