Just get the mf31.
2000 Range Rover 4.6 Petrol Auto P38
- Thread starter lazbaz
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Just get the mf31.
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Yes, that sounds about right. Remember not to cook an old-style fully lead battery though - they're pretty rare now though as the calcium ones have a much better shelf life.
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- Buckinghamshire, UK. ('95 DT)
If his set point is wrong he'll just kill it.
RangeRoller dt
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Battery may be okay it’s the regulator he needs.
Datatek
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I have 3 of them, best battery around and Hancook actually make them, they are not just a branded product as so many batteries are these days.
Datatek
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14.7 volts is the minimum for a lead calcium battery 14.8 is optimum, they will stand 18 volts for short periods which some of the latest alternators output to cover recharging in vehicles that just do short runs.
lazbaz
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So it is imperative for me to get the alternator to deliver 14.8 V?
Otherwise the battery will die quite quickly?
Datatek
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14.5 volts minimum, 14.8 optimum needed in order to fully charge a lead calcium maintenance free battery. Kept in a low state of charge, they die quite quickly. All mine are on solar chargers when parked.
Jon Dor
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As above.
Had mine since Nov 2016 and never let me down. Bought two more for Jondor's 21ltr, straight-8 Gardner 8L3B.
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A battery will start to sulphate at ~12.4v and below
Datatek
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I think you will find that depends on the battery chemistry, there are many different types including deep discharge types, AGM, Gel etc
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Happy to stand correctedI think you will find that depends on the battery chemistry, there are many different types including deep discharge types, AGM, Gel etc
lazbaz
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What is low state of charge? Battery terminal voltage down to what, 12.5V,12V,11.5 or lower to what voltage before it will not recover?
RangeRoller dt
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11.something they say its permanently deaded, although there is an expensive bit of kit that some garages have that may be able to cycle it back to life.
Datatek
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It varies depending on battery chemistry, but 11 volts for a lead calcium battery is dead and it may or may not recover.
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