New battery- will I have issues?

[Scrump]

Unless you are trying to save weight then I would always recommend going for the larger capacity battery if there is a choice.
The smaller battery will likely have a lower CCA which is the cold cranking power and it will have a lower capacity so will not tolerate extended periods parked up as well as a larger capacity battery would.
Cold weather and/or an engine with issues will cause starting problems sooner with the smaller battery. Warm weather and a healthy engine will mean your new battery will be fine.

[Dogwatch]

The OEM battery failed on my '11 Focus so I ordered a new one to the same spec. And certainly not some cheapo make.
When it came the new one was about a third smaller to my surprise, but has given good service with no problems - apart from making sure it couldn't slop about in its now oversize box.

[GreenV8S]

anonymous said:

[redacted]

Is that a brand of conventional lead acid batteries? At first I guessed you meant Li-Ion (Lithium Ion), which is not commonly used for car batteries.

Assuming you are talking about lead-acid, bigger is usually better but a 10% reduction in CCA is not huge deal.

[ZX10R NIN]

It'll be fine I've seen this on a few batteries that the replacements are smaller but no issues.

[InitialDave]

I suspect a previous owner just bunged in whatever battery was available/cheap, I've found this before on a car where the correct battery was disproportionately expensive for its size. If it's what's listed for the car and it works, I wouldn't worry about how it compares to what was removed.

GreenV8S said:

Is that a brand of conventional lead acid batteries? At first I guessed you meant Li-Ion (Lithium Ion), which is not commonly used for car batteries.

I firmly believe they knew damn well what they were doing when they picked the name.