Hey guys,

as it seems, my 3.2l has a dead battery. It will discharge really quickly. Not good. Alternator is new so it is charged well.

Now, I am not looking for recommended battery brands... I would like some ideas towards power and ratings...

I have read of 75Ah and 725A being the right ones. But are there more powerful ones available which will work well with the standard Denso alternator?
Cheers

Damien

 

Here in North America we use the H8, Group49 or MB88 size battery.

I don't know the European Equivalent.

bob

 

The battery design #019, these days the oem is on the low side.

Battery tech has progressed in 20 years. My x2 are 100Ah and 850A with 4 year warranty. Bosch and Lucas batteries are made by Varta....cough....

I'd say a bad battery is worse on the alternator than a fresh one and can cause failure of the alt.

Also - considering the electrical demand these cars require a bigger capacity battery isn't a negative.

 

Cheers Sean!

I was actually considering a 100Ah battery, especially since the alternator has a high output...

 

Before buying, you might want to run a quick amp-check by installing a multi meter in serie between the negative pole and the earth cable.

Lock the car, wait till all modules enter sleep-mode, and read the remaining amperage, which should be around 30mAmp.

Peace of mind after you had so many electrics disconnected during the engine out.

 

Good idea but the battery died 3 weeks after I parked it without removing the engine

 

Then the conclusion is probably:"DEAD" .

 

Dead, deader, deadest

 

I'd recommend a 100 Ah battery. I'm using it since 2-3 years day after day and no issues even when having -15/-20 deg Celsius in the morning.

 

I think I got Exide 100 Ah but I feel I would do just fine with a stock capacity battery. I would pay attention to CCA, though.

And definitely use a battery ventilation tube!