We have a 2009 Fiesta 1.4 petrol and replaced the battery with a Bosch battery 5 years ago after the same issue. The car does a few short journeys a week so not ideal but there's no signs that the battery is about to go flat.
Yuasa are high quality. I generally get Bosch S4 or S5 as they've never let me down.
And yet my 2008 VW had a Bosch battery out the factory ????♂️.
Fucking thing lasted 10 years or so though. So credit to Bosch for that one!
I've had good luck with Bosch (made by Varta iirc) and Yuasa.
I had a 12v battery give me a low voltage warning and they just came around and changed it.
It's a Tesla thing.
Tesla doesn't keep a buffer zone at the top end of the battery. 100% means 100% in a Tesla. Tesla advises to only use 100% when you need the extra range.
New battery fitted and all ok for about 2 months, then same problem. Took new battery out (AGM Bosch S5 A08) and charged it on the bench, left it there overnight. Next morning its reading 12.2v.
2020 SR+ 51K I get about 229 miles at 100%, advertised range was 250 when it was purchased new.
I recently had to sell my 2013 model s for scrap value because the battery was out of spec. Tesla wanted 25k to replace. It was right at 200,000 miles.
My experience: Stay away from Bosch.
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