997 Battery

[Ian187]

I've recently bought my C4S (997) and the battery turns the engine over, but doesn't seem to be "lively" so I was thinking maybe I need a new battery.

Before I did I bought a CTech charger and tried conditioning the battery, it definateoly helped a bit, but it still doesn't turn the engine over as quickly as I thought it should.

So after searching the forum quite a lot I'm going to buy a new battery, but then I'm a bit confused as to what battery would be a good replacement. I've figured that the Porsche branded Moll battery is useless and people seem to rate the Bosch Silver S4 or S5 batteries - however there are also different types of S4 and S5 batteries - there is the 100 version and the 110 version. (the 110 version seems to be 85Ah and 800cca which seems to be quite good from what I've found so far).

I'm quite happy to pay the extra for a really good battery, can anyone tell me what they would recomend and what they have used and also should I expect the engine to turn over lively or is that just the way a big 3.8 litre engine is???

[mankey]

I went through a similar experience, but I've had the car for a couple of years. I was ******-off at the prospect of paying stupid money at the OPC for an inferior battery and went to EuroCarParts. Think I bought this Bosch one which with 25% off last month came to around £67.