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post #6 of 8 (permalink) Old 20th January 2006
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55Ah doesn't sound a great deal to me - even for a modern efficient battery. I know manufacturers are cutting down on the weight of vehicles by fitting the smallest battery they can get away with. Diesels take a reasonable amount of power to get them going, the batteries are higher capacity than the equivalent petrol models.

A battery of between 70Ah and 80Ah is specified for the 2.2dci engine, depending on hatch/estate, year of build etc etc. So you would need the 75Ah optima battery you mention - but as you say - it is physically too big to fit.

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Last edited by SportTourer; 20th January 2006 at 11:31 AM.
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post #7 of 8 (permalink) Old 25th January 2006 Thread Starter
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Energy AGM Battery


Iv come across a much better battery and I think is the one. It's the
"AGM 85" 85Ah 23.0KG 750CCA 260 x 169 x 213 mm

AGM SERIES: Features

Safety Sealed VRLA capacity
Electrolyte Suspension System
Totally Maintenance Free
Heavy Duty Grids
Superb Cyclic Service Life
"Comfort" Handle
Deep Discharge Recovery
ISO 9002, US, UL, JIS European CE approval

Also found some info on another site

Any suggestions

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post #8 of 8 (permalink) Old 25th January 2006
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I'm not sure why you're looking for a deep discharge battery. These have especially robust plates to minimise the unavoidable damage that's done when you deep cycle a lead acid battery, but the trade-off is that they're generally of lower capacity and have lower maximum current outputs than a conventional starting battery of similar weight and size.

A better bet would be a conventional starting battery, with the priority on cranking amps and then overall capacity. If that can't keep up with the stereo, then an alternator upgrade is probably the best way forward.
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advise , battery , optima

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