Battery Bosch or AC DELCO

Bosch batteries in my older bmw lasted around 5 years but I was told it’s recommended to change every 2 years.

I put in ACDelco and surprisingly it lasted till last week (Aug 2024).

The AcDelco I installed in 2021 December died this morning so I'd say it's good. It lasted almost 3 years and I only park outside + have a whole sound system + aftermarket horns.

Change mine in my 2016 Golf R to this battery and it's been great. EFB shite didn't even last the first 3yrs.

I'd recommend AC Delco - had 2 batteries from Repco (made by century) for my VZ Commodore Wagon and returned them both for dropped cells within a month of fitting - had no issues with the AC Delco at all, even leaving the car sitting for over two weeks it still started first turn of the key

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.

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.

There is a known random issue with 400 packs. On mine, it is always when I turn on the bike. The speedometer doesn't come on and there is no assist. What I learned about on the internet is to push the test button on the battery with the bike turned on and it will reset and work just fine.

I've had a couple of issues with my BMW 5-series, I found Bosch batteries don't last as long as they should. I changed them twice in the span of 3 years or so, each time resetting the battery management system with the correct capacity. I changed it to a Deka Intimidator and I'm much happier with it.

I bought a Bosch battery from a respected online company in the UK. The only change I made was uprating from a 100Ah Varta I think the original was to a 110Ah Bosch S5 015 as I thought more storage would help as the car ages and things are naturally a bit more susceptible to failure. Battery lasted 3 years until about January/Feb 2024 when a cold snap hit and the battery just failed to hold a charge overnight.