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.
XM4 batteries are interchangeable to XM3. my XM3 is now packed with more power lol.
size of the battery is okay, it fits alright, it does not heat up, etc. it definitely works, thanks OP!
\* will return here for updates if there are some issues that i will encounter while using it, but so far, it works like a charm.
Exide are great batteries and are a tier 1 supplier with Yuasa, Bosch, Varta.
Yuasa is top end and I would buy over Bosch! I have Yuasa batteries in all my cars now.
Yuasa are high quality. I generally get Bosch S4 or S5 as they've never let me down.
Regardless, while that’s sorta old for a battery, I have OEM BMW batteries going on 12 years with 89% charge capacity.
Still running on its original battery that came with the car.
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.
Having been burned with low quality auto parts store batteries (specifically for the Prius) and their being unable to honor their warranties, the Toyota battery is the only way to go.
In my old Audi, I had a non-OEM battery and I did the +1 in the serial number trick. That battery failed in a couple of months. I honestly think it was a bad unit.
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