I have been driving a 2022 330e since March 2022 and haven’t seen any battery degradation to date. In the NY winter I still get at least 20 miles on a full charge, in the summer 23-30.
I set off to test the X5 battery to see if degradation was better or worse than my iPhone's 10% degradation over one year. We've driven 29,996 miles, 15,296.5 electric. My best all-electric range achieved was about 41 miles when new. After one year, I achieved exactly 41 all-electric miles from a full charge in ideal conditions. Zero percent degradation as measured by this test. It appears temperature and AC/heat use have much greater impacts on range than actual battery health at this stage. Results look better than expected for long term ownership and residual value.
I put in a Varta CP1254 A3, same form factor, similar enough specs.
UPDATE: I put in the bigger battery, it's great. The Cp1254 A4 gets me 1-2 hours extra use over the A3 and I believe even the original Z55H.
I just replaced my xm3 batteries (they are cp1254a3 with 60mah) and I replaced it with the newer version (cp1254a4 with 74mah). No issues and more capacity.
Yep. Varta is a good battery. My battery died this year in March. I replaced it and paid 800 for a Varta battery for my dodge charger. So far so good!
Varta battery refused to die even after 5years mannn that’s a wow ..to add on I don’t use my car often i use fireblade as my daily commute for the last two years..
My XM3s went from a good 6 hour run time down to 2.5 hours in about 20 months. The last month alone has seen 30 mins wiped off them.
I went with the Varta A4 models bought from a Czech supplier called [Battex.cz](https://Battex.cz).
Varta are a pretty decent brand of battery (although their consumer AAs suck), would not expect it from them.
The factory battery is rubbish though. So get a better branded battery - varta or Bosch are good.
my bmw would say this, a year after having a new oem batt installed, and only in the winter, dealer couldn't find the problem, so I traded it in for another subaru because parasitic draws are the last thing you want in a german car
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