Battery

[Mesterh]

School day tastic, I didn't know some trannys took two.

[NFG]

Hi again,

 

Id be surprised if the resting voltage was over 13.0 volts, its probably around 12.4 - 12.8

 

It may reach a higher voltage directly after charging but will drop back fairly quickly.

 

Your alternator or charger should output around 14.0 - 14.6 V which is the Absorption charge for the battery.

 

It will initially bulk charge the battery to that voltage at the highest current it can output, then hold the voltage steady & reduce the current to charge to its full capacity, the battery will gas slightly at this voltgae hence the vent holes in the cell tops.

 

Periodically you need to do an equalising charge which will reduce the effects of sulphation and bring the battery to its best condition.

 

hope this helps

 

 

N

[NFG]

Time I'd jumped the Tranny and limped it to my mates garage both batteries read 10.6v.

Didn't seem worth asking a new alternator to perform miracles.

 

Good decision, would always be trying to charge no matter & the battery would probably only let you down when you needed it.

 

Incidentally those Optima batteries are good but for a price

 

N

Edited January 10, 2016 by NFG

[peatff]

Hi again,

 

Id be surprised if the resting voltage was over 13.0 volts, its probably around 12.4 - 12.8

 

It may reach a higher voltage directly after charging but will drop back fairly quickly.

 

Your alternator or charger should output around 14.0 - 14.6 V which is the Absorption charge for the battery.

 

It will initially bulk charge the battery to that voltage at the highest current it can output, then hold the voltage steady & reduce the current to charge to its full capacity, the battery will gas slightly at this voltgae hence the vent holes in the cell tops.

 

Periodically you need to do an equalising charge which will reduce the effects of sulphation and bring the battery to its best condition.

 

hope this helps

 

 

N

 

A battery reading 12.4 is flat, it should read over 12.6 or it will struggle to turn a decent engine over especially a diesel.

[Bird]

Thank you for all the help and advice .... This morning after re fitting the battery, it started a treat ! And has continued to do so throughout the day !

[Logged On]

Batteries aren't what they used to be I've been told...

 

Skimping on the lead for the plates etc.

 

You got an earth leak somewhere BTW??

 

Either that, or this first proper cold snap has finally goosed it....??

[twistedhicap]

Batteries aren't what they used to be I've been told...

 

 

 

Skimping on the lead for the plates etc.

 

 

 

You got an earth leak somewhere BTW??

 

 

 

Either that, or this first proper cold snap has finally goosed it....??

 

 

A lot of battery's also use recycled lead which apparently is not as good as virgin lead !

[cornish wood burner]

Thank you for all the help and advice .... This morning after re fitting the battery, it started a treat ! And has continued to do so throughout the day !

It might have been sidelights left on or something.

Presumably the freelander was used a week or two before the battery went flat, so if it happens again I would get your charging system checked.

[Mesterh]

Batteries aren't what they used to be I've been told...

 

Skimping on the lead for the plates etc.

 

You got an earth leak somewhere BTW??

 

Either that, or this first proper cold snap has finally goosed it....??

 

Batteries must take a lot more hammering these days though which must shorten the life expectancy?

[Richard 1234]

The battery on my l200 ran flat last Christmas got it checked out. The guy did not even get the tester out as he took one look and the battery was only half full. Topped up and went for a 10 mile or so run in it. It worked fine after so I think I was lucky it was no knackered