New battery

[Timdon]

Can Anyone recommend reasonably priced new battery for a z4e89 35i without using the dealers
Cheers

[mr wilks]

www.tayna.co.uk
Ring them with your reg , pay & wait for it to arrive

[Timdon]

Cheers I’ve seen these on eBay are they any good ?

[obewan]

I bought a new battery at Xmas, normally I use Tayna (good price and excellent service) but at the time Halfords was actually cheapest, Used Top Cash Back as well for a bigger discount

[Col280]

Try Euro Car Parts, they have a sale on just now. I got one for my E89 3.0 just after Christmas. I went for a Bosch S5, it was £197, reduced to £108 after entering the discount code.

[mcbutler]

Yes, join the AA then when you break down they will fit you a new one cheap......

[step_change]

Doesn't the battery have to be coded nowadays to the car? Gone are the days when you could just buy one from Halfrauds and fit it yourself ten mins later???

[obewan]

I didn't - no issues
viewtopic.php?f=45&t=110990

[Mr Tidy]

Doesn't the battery have to be coded nowadays to the car? Gone are the days when you could just buy one from Halfrauds and fit it yourself ten mins later???

I think later ones need coding - my 1 Series had an AGM battery and stop/start. The Battery lasted less than 5 years. And cost over £250 to replace by the time it was coded.

My E86 battery lasted 11 years and cost about £100 to replace.

My E91 battery lasted over 12 years, and cost £125 from the RAC - I had Home Start!

So progress seems to be going backwards and costing more!

[tintoverano]

when capacities (Ah) are the same there's no need for registration in theory, but still smart charging may throw errors related to uncleared stored voltage values, etc.

[R.E92]

when capacities (Ah) are the same there's no need for registration in theory, but still smart charging may throw errors related to uncleared stored voltage values, etc.

You still need to register the battery, even if the type is the same. With battery registration you are telling the intelligent charging module that the battery is new and that it needs to adjust the charging profile.

Further coding is needed if you change capacity or type of battery.

It's not even debatable that any new battery needs to be registered. Failing to register won't stop the new battery working, but you will shorten the life span of the new battery. Quite an expensive corner to cut if it fails again in a couple of years.

[ph001]

It's not even debatable that any new battery needs to be registered. Failing to register won't stop the new battery working, but you will shorten the life span of the new battery. Quite an expensive corner to cut if it fails again in a couple of years.

Here we go again...

[Pbondar]

It's not even debatable that any new battery needs to be registered. Failing to register won't stop the new battery working, but you will shorten the life span of the new battery. Quite an expensive corner to cut if it fails again in a couple of years.

Here we go again...

Well R.E92 may well be right..

https://www.greencarcongress.com/2006/0 ... uces_.html

According to that the car has to know what 80% capacity is, in order to trade off using regenerative braking vs running of of juice..

You could argue who cares, but a battery at the end of its life is maybe say 30% efficient so when the new battery is fitted it will have some effect either undercharging or overcharging, my brain hurts trying to work it out..

A full dissitatation is here..which supports R.E92's assertions (on this subject, I don't know what other assertions he has made! )

https://bimmertips.com/bmw-battery-regi ... explained/

[ph001]

...and how do you suppose the car knows the state of charge of the battery when it is first fitted?? Bearing in mind they are often sat on a shelf for 6 months in a stock room. Same when people connect a charger directly across the battery, bypassing the IBS module.

I'm not going to go into the technicalities of all this again as you can read it all on my other posts on the subject, suffice to say all the calculations are done through LIVE data measurements by the IBS module. It all sorts itself out after a few charge / discharge cycles.

[Nictrix]

This is a funny one because everything in your head says it shouldn't matter and the car should be able to adjust whether the battery is old or new.
I have replaced the 2 batteries in our 2 cars and had both of them coded when fitted, for the extra small cost (if there was any) it doesn't really matter.
If the battery is not coded and fails to last the length of the warranty would it be replaced free of charge? (pardon the pun)
So who do you believe, the manufacturer or some random from the internet?
I don't know.