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In a previous post about batteries it was stated that 80ah minimum was required for a Sedona.
I bought a new battery just under a year ago for my 2002 TD from the local battery specialist. Since April last year I've had no problems but In the recent sub zero temperatures it would not turn over even though I always depress the clutch while starting to ease the load. I put the battery charger on and in a short space of time it's fully charged so the battery isn't losing power it just seems not powerful enough.

I've just noticed that the battery is a 68 ah. Before I go back to the shop can anyone confirm that 80ah is needed please.
 

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Its all to do with cranking power of the battery and not that its a 68ah or a 80ah, but generally if the battery is a 80ah the cranking power is usually quite high.
E.g a standard 80ah battery has a cold cranking power of 680amp dependant on make.
A Varta silver calcium 95ah has a cold cranking power of 830amp.
Your 68ah will probably only have a cold cranking power of 550amp
I know what one I would go for.



Edited by: davy
 

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Another thing that slows the cranking speed & is only really noticeable in cold weather , is build up of carbon dust ( from the brushes ) in the starter motor. I changed batteries some years back due to slow cranking & hard to start when cold . Then I changed the starter motor solenoid internals & it still wasn't cranking right, so I stripped the motor as a last resort before replacing to find an absolute mountain of carbon dust jamming everything inside. Worked a treat after that.
What you also have to remember is that on the diesels without glow-plugs they have an air inlet heater which consumes a vast amount of current & if the starter cranking speed is slow it will struggle to start.
 
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