Hi,
I have a 2012 Venture Edition MX5 1.8 and need to replace the Car Battery which is the original one.
I have gone onto several websites and entered my Reg no and they all show the Bosch S4 021 as a replacement to use.
Has anyone used this battery in there MX5 as a replacement as I am not sure it will fit.
The dims are
Length : 238mm
Width : 129mm
Height: 227mm
I’ve just measured the one in the car and it is only 225mm at the top of the battery.
If this will not fit then can anyone recommend a battery to purchase??
I can second the Yuasa batteries, had that one on my last NC and also have a Yuasa fitted to my daily driver, that was a different spec though as it has stop/start.
i saw something on youtube where a guy put a lithium battery in!
iv got to run out the door right now but il have a look later and see if i can post it for you!
i had never actually watched this video until just now! nd i am SERIOUSLY IMPRESSED!
that lithium battery is a full 10kg liter than a lead-acid battery and its smaller in dimensions.
and yet it has the same power output!
it also has an inbuilt charge lvl display!
ok, there is a bit pricy running at 145 in the video against 80 for a Halford’s lead-acid.
but i think it is worth the extra.
this is something that i will defiantly be looking at buying at some point in the future.
not something I’m going to run out and buy, but when my current bat needs replacing it will be replaced with one of these.
I would stick with a standard spec Lead Acid battery if it was my car the charge curve and voltage are different for lithium batteries and they like making bonfires if charged incorrectly!
Your original Lead Acid battery has lasted 10 years, that sounds all good to me. Just don’t let Lead Acid Batteries go flat and they will work for years.
If your car is stored for more than a few weeks buy an good quality intellegent charger e.g. Ctek MSX5 or the far bettef MXS7.
that particular lithium bat comes with its own charger BUT most of the charging will be done by the car’s alternator!
so that raises the question. do you need to rejig the car’s electronics, particularly the alternator if you want a lithium bat and want it to be completely correct and proper?
defiantly food for thought! and mostly likely for someone who knows their electronics because it’s certainly above my knowledge grade!
i have alrdy spoken to gaz on youtube and you are correct he is a super nice guy.
we didn’t talk about bats though.
and tbh changing my bat is a far off future item, so there no point right now.
There are some very good lead acid batteries on the market . Personally I have used Bosch batteries on my NB. I cannot see any advantaged using Lithium units. The very high cost and questions about their reliability are a problem. It is so easy to look after a battery.
Lithium batteries are highly controversial in the Ducati world.
Some folk have fitted them and say they’re great.
Others say they need a specially designed charging system and using a charging system designed for lead acid can turn a lithium battery into a potential fire bomb
Yes Rob, I have one fitted in my NB. Make up a simple flat tray out of a 5 litre oil container side, just to keep the battery up off the car body incase of spillage etc.(very unlikely)
I use lithium polymer batteries for my RC models (planes/helis/drones etc). the standard 1 cell LiPo is 3.75v depleted/needs charging to 4.2v fully charged.
I don’t know whether they use LiPo or some other chemistry, but if they do use LiPo Yes they pack a lot of energy and they are much lighter than Lead Acid batteries but…be aware that if they go wrong, they go wrong with a massive fire. (you can google that for appropriate videos)
You can have have electronics added into the battery casing so that the battery can be charged by the standard equipment that’s on your car - i.e. the alternator. I wouldn’t connect to them to a trickle charges or if its needs charging etc, you probably need to check their specifications what they recommend.
Now, because they are light they are (and have been) used in race cars for a while. However personally I wouldn’t want to have one of these into my car. I keep all my LiPo batteries into various used metal ammo boxes, I simply wont trust them 100%. I have seen too many go wrong.
