Vehicle & Technical > Discovery

Battery Problems

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L90OOK:
The water level should be to the bottom of the plastic inside the hole.
Don't jump it & take it for a drive as alternators only top up batteries not charge them properly from flat.
Charge the battery overnight...providing the chargers working & go from there.
You can take the battery into somewhere like ATS who will be able to drop test the battery & tell you if it's ok or not.

CNorman:
L9000K, i believe the disco and rrc alternators are something like 80Amps, if they are they would recharge a totally dead, flat battery to totally full in about 90 mins.

Only 20 minutes should see it amply charged for restarting the vehicle.

driftwood:
when the battery is flat take all the cell caps off, get someone to try and start the engine.........1 sign of a duff battery is as you start it ( obviously the engine wont crank ) look for tiny bubbles in each cell. if there is a load in one of them.....new battery  :cry:

also with the engine running check the voltage of the battery, it should be more than 12 volts, dont quote me but 13-14 volts i think , more than 12 though. this will check to see if the alternator is working to a degree. it could be the alternator belt that require tightning also.....

Terranosaurus:

--- Quote from: "driftwood" ---also with the engine running check the voltage of the battery, it should be more than 12 volts, dont quote me but 13-14 volts i think ,
--- End quote ---


You need 13.8v to charge a battery (to about 90%), for a full charge you need 14.2v and no more as this will damage the battery. Anywhere between the two is fine.

beattiedh:
Many thanks Guys

Been out for a drive and she seems OK now.

Going to take her for a long drive tomorrow to make sure the Battery is given a good blast.

It is a 3.5 EFi so it has a good alternator onit.

Will also top up the battery with distilled water tomorrow.

Duncan

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