Ls400 IV battery

[Kayjayem]

Hi I seem to need a new Battery for my new to me LS400 V Reg , any preferences ?

 

[Howplum]

Surprisingly perhaps, Lexus usually come up trumps. Try Lexus Parts Direct:

https://lexuspartsdirect.co.uk/

[Kayjayem]

19 minutes ago, Howplum said:

Surprisingly perhaps, Lexus usually come up trumps. Try Lexus Parts Direct:

https://lexuspartsdirect.co.uk/

Thanks

 

[m4rkw]

Other than perhaps cost is there any reason not to go to Halfords and just get the biggest Yuasa Battery that will physically fit in the space available?

[Howplum]

41 minutes ago, m4rkw said:

physically fit in the space available?

And with the terminals in the correct position.

[m4rkw]

Apparently it's not a good idea, as cold cranking amps goes up, reserve capacity goes down. Therefore it would seem that the correct Battery for the car is the better option. Who knew!

[smallredball]

13 hours ago, m4rkw said:

Other than perhaps cost is there any reason not to go to halfords and just get the biggest Yuasa battery that will physically fit in the space available?

I thought the Yuasa was more expensive than the Lexus Battery, bought direct (£86)? 

[BigBoomer]

The current drawn by your starter motor is determined mostly by the starter motor resistance (and once it starts moving the reluctance in series with the resistance) with the Battery internal resistance also having a minor effect.
Starter motors can momentarily draw up to 250Amps but the high end of that is for Diesel engines due to the high compression ratios involved.
Petrol engine starter motors rarely draw more than 150Amps and that only briefly as the current drops once the motor starts moving.

CCA is defined as the maximum current that a battery can supply at 0°C when brand new and fully charged.
The maximum current the Battery can supply drops with temperature, with age, and with state of charge.
A higher CCA Battery will generally last longer unless it suffers an internal fault, but will cost more.

Ah (Ampere-hours) is the capacity of the Battery. A 70Ah Battery will theoretically provide 70A for one hour or 1A for 70 hours. It's more complex than that due to voltage drops, internal resistance, and changes in chemical reactions inside. Higher Ah is also fine, but normally means the Battery is bigger

As a rule of thumb, get the highest CCA Battery that has the correct (or higher) capacity (Ah) that will fit in your car but do not go below the recommended CCA if you are on a budget. Once you go below the recommended CCA, the Battery lifespan decreases dramatically.

Because Battery technology is constantly improving you can now get higher capacity and higher CCA batteries (in the same physical size) than 15+ years ago when the LS400s/430s were built. You will pay more, but they will generally last longer.
It's rare for Lead-Acid (incl. AGM & Gel) batteries to last over 8 years even when they are pampered.

[Tinonline]

Take it from a few of us on the Forum...check the dealer price and take your motor there...if they are decent they will swop it over for you too. 
 

Job done and OEM.

[Kayjayem]

On 3/8/2021 at 1:50 PM, Tinonline said:

Take it from a few of us on the Forum...check the dealer price and take your motor there...if they are decent they will swop it over for you too. 
 

Job done and OEM.

Have done just that, ordered from local Toyota dealer (nearer) right part number and indeed only £87 + VAT

Thanks all,

 

Keith