Battery discharging

  • Thread starter Kevin1 via CarKB.com
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Kevin1 via CarKB.com

Guest
Hi all I am new to this so please bear with me I have a diesel range rover
(99) I've had it about 3yrs without any problems it is bog standard nothing
added or taken away but a few months ago the battery went flat after stand
for about a week recharged it but it kept on happening so bought new battery
but it still happens can anybody help Thanks


--
Message posted via CarKB.com
http://www.carkb.com/Uwe/Forums.aspx/land-rover/200510/1
 
>>>>> "Kevin1" == Kevin1 via CarKB com <u14815@uwe> writes:

Kevin1> added or taken away but a few months ago the battery went
Kevin1> flat after stand for about a week recharged it but it kept
Kevin1> on happening so bought new battery but it still happens
Kevin1> can anybody help Thanks


You need to work out where the current is going.

Put an AMMETER in series with the battery negative lead. Watch and
see what happens to the current flow after 2 minutes once the BeCM has
gone to sleep.

0.6A is a good indication that something is keeping the BeCM awake.

Cycling from 0.06 to 0.6A every 2 1/2 mins is a good indication that
you have an Oregon Scientific weather station keeping the BeCm awake.

Andy

--
Andy Cunningham -- www.cunningham.me.uk
....and the French an excuse to use their traditional battle cry.
-- Firebeard
"We surrender, here, have my daughter?"
-- Paul Tomblin
 
Thanks Andy for being so quick will let you know the results tomorrow

Kev

AndyC the WB wrote:
>>>>>> "Kevin1" == Kevin1 via CarKB com <u14815@uwe> writes:
>
> Kevin1> added or taken away but a few months ago the battery went
> Kevin1> flat after stand for about a week recharged it but it kept
> Kevin1> on happening so bought new battery but it still happens
> Kevin1> can anybody help Thanks
>
>You need to work out where the current is going.
>
>Put an AMMETER in series with the battery negative lead. Watch and
>see what happens to the current flow after 2 minutes once the BeCM has
>gone to sleep.
>
>0.6A is a good indication that something is keeping the BeCM awake.
>
>Cycling from 0.06 to 0.6A every 2 1/2 mins is a good indication that
>you have an Oregon Scientific weather station keeping the BeCm awake.
>
>Andy
>


--
Message posted via http://www.carkb.com
 
I've done as you suggest and am getting a reading of approx 0.033

AndyC the WB wrote:
>>>>>> "Kevin1" == Kevin1 via CarKB com <u14815@uwe> writes:
>
> Kevin1> added or taken away but a few months ago the battery went
> Kevin1> flat after stand for about a week recharged it but it kept
> Kevin1> on happening so bought new battery but it still happens
> Kevin1> can anybody help Thanks
>
>You need to work out where the current is going.
>
>Put an AMMETER in series with the battery negative lead. Watch and
>see what happens to the current flow after 2 minutes once the BeCM has
>gone to sleep.
>
>0.6A is a good indication that something is keeping the BeCM awake.
>
>Cycling from 0.06 to 0.6A every 2 1/2 mins is a good indication that
>you have an Oregon Scientific weather station keeping the BeCm awake.
>
>Andy
>


--
Message posted via CarKB.com
http://www.carkb.com/Uwe/Forums.aspx/land-rover/200510/1
 
Kevin1 via CarKB.com wrote:
> I've done as you suggest and am getting a reading of approx 0.033
>
Sounds like the battery has done it's dash then. Time for a new one.


--
EMB
 
>>>>> "EMB" == EMB <[email protected]> writes:

EMB> Kevin1 via CarKB.com wrote:
>> I've done as you suggest and am getting a reading of approx
>> 0.033
>>
EMB> Sounds like the battery has done it's dash then. Time for a
EMB> new one.

0.033A is a normal reading for battery drain when the vehicle is
powered down. It could well be that the batter is at the end of it's
life, but this doesn't follow directly from the reading.

The best way to tell if the battery is dying is to have someone watch
the meter while you crank the engine - if it drops below 9V, you can
be pretty sure the battery is no longer serviceable.

If the battery is still OK, then tracking down the extra drain will be
more troublesome. Possible, but troublesome. Let's eliminate that
possibility before going on to the next one.

Andy



--
Andy Cunningham -- www.cunningham.me.uk
"The word you want is 'discrete,' which means 'made of separate
parts.' The word 'discreet' is also a good one to know, but it means
'stop looking down your subordinate's blouse.'" "Actually, it means
'do it so that people don't notice too much.'" -Kevin and Amdee, a.s.r
 
On Mon, 17 Oct 2005 14:21:12 +0100, AndyC the WB wrote:

> Cycling from 0.06 to 0.6A every 2 1/2 mins is a good indication that
> you have an Oregon Scientific weather station keeping the BeCm
> awake.

Is that a specific interfaction between the Oregan and BeCm or would
any other bit of "wireless" kit operating in/on the relevant frequency
(presumably 418 or 433MHz) also cause this effect?

--
Cheers [email protected]
Dave. pam is missing e-mail



 
Battery dropped to approx 9.4v

AndyC the WB wrote:
>>>>>> "EMB" == EMB <[email protected]> writes:
>
> >> I've done as you suggest and am getting a reading of approx
> >> 0.033
> >>
> EMB> Sounds like the battery has done it's dash then. Time for a
> EMB> new one.
>
>0.033A is a normal reading for battery drain when the vehicle is
>powered down. It could well be that the batter is at the end of it's
>life, but this doesn't follow directly from the reading.
>
>The best way to tell if the battery is dying is to have someone watch
>the meter while you crank the engine - if it drops below 9V, you can
>be pretty sure the battery is no longer serviceable.
>
>If the battery is still OK, then tracking down the extra drain will be
>more troublesome. Possible, but troublesome. Let's eliminate that
>possibility before going on to the next one.
>
>Andy
>


--
Message posted via CarKB.com
http://www.carkb.com/Uwe/Forums.aspx/land-rover/200510/1
 
>>>>> "Dave" == Dave Liquorice <[email protected]> writes:

Dave> On Mon, 17 Oct 2005 14:21:12 +0100, AndyC the WB wrote:
>> Cycling from 0.06 to 0.6A every 2 1/2 mins is a good indication
>> that you have an Oregon Scientific weather station keeping the
>> BeCm awake.

Dave> Is that a specific interfaction between the Oregan and BeCm
Dave> or would any other bit of "wireless" kit operating in/on the
Dave> relevant frequency (presumably 418 or 433MHz) also cause
Dave> this effect?

It's a generic effect. Anything transmitting on 433Mhz (for European
spec vehicles) can keep the BeCM awake. Newer models have a narrow
band pass filter to prevent/reduce this effect.

Andy


--
Andy Cunningham -- www.cunningham.me.uk
Smoking does not make you look cool. It makes you look moronic. Next
time you're out cruising, watch an 11-year-old with a butt in his
mouth. That's what you look like to anyone over 20. Ditto for
"expressing yourself" with purple hair and/or pierced body parts.
-- Charles J. Sykes, "Dumbing Down Our Kids: Why American Children
Feel Good About Themselves But Can't Read, Write, Or Add."
 
On Thu, 20 Oct 2005 10:18:12 +0100, AndyC the WB wrote:

> It's a generic effect. Anything transmitting on 433Mhz (for
> European spec vehicles) can keep the BeCM awake.

> Newer models have a narrow band pass filter to prevent/reduce this
> effect.

Well that might help nearby Radio Amateurs keeping it awake but what
about all the wireless devices that are about these days all on the
same spot frequency? Thermostats, burglar alarms, weather stations,
door bells and so on. There must be loads of them in your average
urban estate these days...

--
Cheers [email protected]
Dave. pam is missing e-mail



 
As Ihave said this problem only started a couple of months ago and as far as
I know none of my neighbours have bought anything that might have an affect
on the battery
Dave Liquorice wrote:
>> It's a generic effect. Anything transmitting on 433Mhz (for
>> European spec vehicles) can keep the BeCM awake.
>
>> Newer models have a narrow band pass filter to prevent/reduce this
>> effect.
>
>Well that might help nearby Radio Amateurs keeping it awake but what
>about all the wireless devices that are about these days all on the
>same spot frequency? Thermostats, burglar alarms, weather stations,
>door bells and so on. There must be loads of them in your average
>urban estate these days...
>


--
Message posted via CarKB.com
http://www.carkb.com/Uwe/Forums.aspx/land-rover/200510/1
 
On Fri, 21 Oct 2005 10:32:16 GMT, Kevin1 via CarKB.com wrote:

> As I have said this problem only started a couple of months ago and
> as far as I know none of my neighbours have bought anything that
> might have an affect on the battery

How do you know what your neighbours have bought recently?

I think you've previously posted that the voltage during cranking
drops to 9 or so. The battery is knackered, possibly just due to age
or the deep discharges. ISTR you saying that it was flat after a week
of standing at some point. Car batteries *hate* deep discharges, just
one can be enough to effectively kill it, especially if its a bit old.

--
Cheers [email protected]
Dave. pam is missing e-mail



 
On or around Fri, 21 Oct 2005 16:47:33 +0100 (BST), "Dave Liquorice"
<[email protected]> enlightened us thusly:

>On Fri, 21 Oct 2005 10:32:16 GMT, Kevin1 via CarKB.com wrote:
>
>> As I have said this problem only started a couple of months ago and
>> as far as I know none of my neighbours have bought anything that
>> might have an affect on the battery
>
>How do you know what your neighbours have bought recently?
>
>I think you've previously posted that the voltage during cranking
>drops to 9 or so. The battery is knackered, possibly just due to age
>or the deep discharges. ISTR you saying that it was flat after a week
>of standing at some point. Car batteries *hate* deep discharges, just
>one can be enough to effectively kill it, especially if its a bit old.

depending on the engine, I've seen 9V when cranking, from an otherwise OK
battery.
--
Austin Shackles. www.ddol-las.net my opinions are just that
"For millions of years, mankind lived just like the animals. Then
something happened which unleashed the power of our imagination -
we learned to talk." Pink Floyd (1994)
 
all i done was what i was advised wife started the car i put the dvm across
and that was the approx voltage i have never be on this site before and for
your info the battery is only about 2 months old

Austin Shackles wrote:
>>> As I have said this problem only started a couple of months ago and
>>> as far as I know none of my neighbours have bought anything that
>[quoted text clipped - 7 lines]
>>of standing at some point. Car batteries *hate* deep discharges, just
>>one can be enough to effectively kill it, especially if its a bit old.
>
>depending on the engine, I've seen 9V when cranking, from an otherwise OK
>battery.


--
Message posted via http://www.carkb.com
 
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