Battery opinions

[MisterO]

Hello guys i need your help! My battery just died and i want to buy a new one but i don't know which type of Ah to choose. The stock is 63 Ah.If i replace it with more Ah, that would be a problem; I think bosch S5 77Ah 780cca is good choice if it fits to the stock box.

[3t3p]

Ah stands for Amp hours. It's how many amps a battery can provide, in theory, for an hour.
so 77Ah is 77amps, for an hour.


The car will only draw how much current (amps) it needs. Having more at the battery end of things can only be a good thing, within reason (weight, cost, size).

What matters a deal for cars is the peak amp providing capabilities of the battery. At startup the starter motor may draw a spike in current to physically turn the engine over that could exceed 100Amps. But this is for a split second only. Do not confuse this peak current requirement with Amp Hours.

To be HONEST you'd be hard pressed to find a budget battery struggle starting the majority of cars. However you may place value in brand name and perceived reliability, actual or theoretical.

Hope that helps

[Cuprabob]

I replaced my OEM battery with a Bosch S5 096 and it has been spot on. Make sure you shop around as the price varies quite a bit.

[Macman]

My SCIROCCO R is the 027 60AH 540A (might be wrong one for a 2010 Model?). It really suffers if used for short journeys, left for 1 month in Winter and trying to start during Winter below 4 degrees. Although during this time I found a faulty AIR QUALITY SENSOR, my ALARM horn ir either OFF by VCDS from a Body Garage Repair as they had no idea of the TOW MODE! Plus I had and fixed the FUEL CAP activator as it was stuck open and needed cleaned with WD40 and worked a bit whilst repeat pressing the FOB Open. These may acululate to Power Draws. The Battery is tested to now be at 85% Health (Amps) and I use a Trickle Charger which also had a REPAIR Function to remove Sulphates. It might last a bit but I also carry a JUMP STARTER BATTERY PACK + LEADS if that even fails.

[bigkris06]

Batteries tend to fail a lot quicker if they are discharged more frequently, particularly in colder weather / climates and short journeys.
I have a Van that is not used frequently and I keep a solar charger and it keeps it charged when not in use. It was only around £20 - £30 and the van always starts. My neighbour has the same on his camper for the same reason and he swears by it as well.
If the battery is left to go low you will have all sorts of random errors as certain bits on the car don’t like low voltage.