I have a Livarno Lux (Lidl) cordless spotlight - the sort with a large
diameter lens at the front, behind which is a powerful halolgen (55w)
bulb and a ring of LEDs, and with a white LED and flashing red LED at
the back.

It normally travels in the boot of my car in case of emergency, but
tends to roll around a bit - which may be related to the problem.

I recently found that it was completely dead - none of its 4 lights
would work. [You're supposed to charge it regularly since the battery
can apparently be damaged if it becomes deeply discharged. It was
working when I tested it 3 or 4 weeks ago, so it's possible that it got
turned on while rolling around (don't we all!) and flattened its battery.]

I recharged it for over 24 hours, and the battery's open circuit voltage
is well above its rated 6v. Three of the 4 lights now work, but the 55w
halogen doesn't. I've tested the bulb on a bench power supply, and it
lights up ok - but in the lantern, nothing. It's drawing several amps
but not lighting - or even getting warm, so I don't know where the
energy is going.

55w at 6v equates to over 9amps, so the filament resistance is only
about 2/3 of an ohm when hot - even lower when cold. Any additional
resistance in the circuit will have a dramatic effect on the current,
and probably stop it lighting.

Question to those who are knowledgeable about rechargeable batteries . . .
What sort of "damage" is likely to result from being discharged too
deeply? Is it possible that this could increase its internal resistance?
If so, is there any remedy - or is it scrap?
--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.

On Saturday, 20 April 2019 23:31:22 UTC+1, Roger Mills wrote:

I have a Livarno Lux (Lidl) cordless spotlight - the sort with a large
diameter lens at the front, behind which is a powerful halolgen (55w)
bulb and a ring of LEDs, and with a white LED and flashing red LED at
the back.

It normally travels in the boot of my car in case of emergency, but
tends to roll around a bit - which may be related to the problem.

I recently found that it was completely dead - none of its 4 lights
would work. [You're supposed to charge it regularly since the battery
can apparently be damaged if it becomes deeply discharged. It was
working when I tested it 3 or 4 weeks ago, so it's possible that it got
turned on while rolling around (don't we all!) and flattened its battery.]

I recharged it for over 24 hours, and the battery's open circuit voltage
is well above its rated 6v. Three of the 4 lights now work, but the 55w
halogen doesn't. I've tested the bulb on a bench power supply, and it
lights up ok - but in the lantern, nothing. It's drawing several amps
but not lighting - or even getting warm, so I don't know where the
energy is going.

55w at 6v equates to over 9amps, so the filament resistance is only
about 2/3 of an ohm when hot - even lower when cold. Any additional
resistance in the circuit will have a dramatic effect on the current,
and probably stop it lighting.

Question to those who are knowledgeable about rechargeable batteries . . .
What sort of "damage" is likely to result from being discharged too
deeply? Is it possible that this could increase its internal resistance?
If so, is there any remedy - or is it scrap?

Likely the battery doesn't have enough oomph to drive the halogen. A multimeter will soon tell you whether that's where the fault is.

If the battery's not well you can try pulse charging it.
'Well above 6v' is too vague btw.


NT

On 20/04/2019 23:32, Roger Mills wrote:
I have a Livarno Lux (Lidl) cordless spotlight - the sort with a large
diameter lens at the front, behind which is a powerful halolgen (55w)
bulb and a ring of LEDs, and with a white LED and flashing red LED at
the back.

It normally travels in the boot of my car in case of emergency, but
tends to roll around a bit - which may be related to the problem.

I recently found that it was completely dead - none of its 4 lights
would work. [You're supposed to charge it regularly since the battery
can apparently be damaged if it becomes deeply discharged. It was
working when I tested it 3 or 4 weeks ago, so it's possible that it got
turned on while rolling around (don't we all!) and flattened its battery.]

I recharged it for over 24 hours, and the battery's open circuit voltage
is well above its rated 6v. Three of the 4 lights now work, but the 55w
halogen doesn't. I've tested the bulb on a bench power supply, and it
lights up ok - but in the lantern, nothing. It's drawing several amps
but not lighting - or even getting warm, so I don't know where the
energy is going.

55w at 6v equates to over 9amps, so the filament resistance is only
about 2/3 of an ohm when hot - even lower when cold. Any additional
resistance in the circuit will have a dramatic effect on the current,
and probably stop it lighting.

Question to those who are knowledgeable about rechargeable batteries . . .
What sort of "damage" is likely to result from being discharged too
deeply? Is it possible that this could increase its internal resistance?
If so, is there any remedy - or is it scrap?

What's the battery volts when the halogen is turned on?

I'm thinking the battery is happy to power the LEDs but drops all its
volts when connected to a 'cold' halogen bulb with a very low resistance.

On 21/04/2019 00:09, Fredxx wrote:
On 20/04/2019 23:32, Roger Mills wrote:
I have a Livarno Lux (Lidl) cordless spotlight - the sort with a large
diameter lens at the front, behind which is a powerful halolgen (55w)
bulb and a ring of LEDs, and with a white LED and flashing red LED at
the back.

It normally travels in the boot of my car in case of emergency, but
tends to roll around a bit - which may be related to the problem.

I recently found that it was completely dead - none of its 4 lights
would work. [You're supposed to charge it regularly since the battery
can apparently be damaged if it becomes deeply discharged. It was
working when I tested it 3 or 4 weeks ago, so it's possible that it
got turned on while rolling around (don't we all!) and flattened its
battery.]

I recharged it for over 24 hours, and the battery's open circuit
voltage is well above its rated 6v. Three of the 4 lights now work,
but the 55w halogen doesn't. I've tested the bulb on a bench power
supply, and it lights up ok - but in the lantern, nothing. It's
drawing several amps but not lighting - or even getting warm, so I
don't know where the energy is going.

55w at 6v equates to over 9amps, so the filament resistance is only
about 2/3 of an ohm when hot - even lower when cold. Any additional
resistance in the circuit will have a dramatic effect on the current,
and probably stop it lighting.

Question to those who are knowledgeable about rechargeable batteries .
. .
What sort of "damage" is likely to result from being discharged too
deeply? Is it possible that this could increase its internal
resistance? If so, is there any remedy - or is it scrap?

What's the battery volts when the halogen is turned on?

I'm thinking the battery is happy to power the LEDs but drops all its
volts when connected to a 'cold' halogen bulb with a very low resistance.

My thoughts too. Also, what sort of battery is it? Do you *actually*
need a spotlight? I reckon those "work" floodlights are usually much
more useful, they are LED and lithium ion and hence very efficient.
Could you replace the halogen with some sort of LED?

On 22/04/2019 10:42, newshound wrote:
On 21/04/2019 00:09, Fredxx wrote:
On 20/04/2019 23:32, Roger Mills wrote:
I have a Livarno Lux (Lidl) cordless spotlight - the sort with a
large diameter lens at the front, behind which is a powerful halolgen
(55w) bulb and a ring of LEDs, and with a white LED and flashing red
LED at the back.

It normally travels in the boot of my car in case of emergency, but
tends to roll around a bit - which may be related to the problem.

I recently found that it was completely dead - none of its 4 lights
would work. [You're supposed to charge it regularly since the battery
can apparently be damaged if it becomes deeply discharged. It was
working when I tested it 3 or 4 weeks ago, so it's possible that it
got turned on while rolling around (don't we all!) and flattened its
battery.]

I recharged it for over 24 hours, and the battery's open circuit
voltage is well above its rated 6v. Three of the 4 lights now work,
but the 55w halogen doesn't. I've tested the bulb on a bench power
supply, and it lights up ok - but in the lantern, nothing. It's
drawing several amps but not lighting - or even getting warm, so I
don't know where the energy is going.

55w at 6v equates to over 9amps, so the filament resistance is only
about 2/3 of an ohm when hot - even lower when cold. Any additional
resistance in the circuit will have a dramatic effect on the current,
and probably stop it lighting.

Question to those who are knowledgeable about rechargeable batteries
. . .
What sort of "damage" is likely to result from being discharged too
deeply? Is it possible that this could increase its internal
resistance? If so, is there any remedy - or is it scrap?

What's the battery volts when the halogen is turned on?

I'm thinking the battery is happy to power the LEDs but drops all its
volts when connected to a 'cold' halogen bulb with a very low resistance.

My thoughts too. Also, what sort of battery is it? Do you *actually*
need a spotlight? I reckon those "work" floodlights are usually much
more useful, they are LED and lithium ion and hence very efficient.
Could you replace the halogen with some sort of LED?

I only use the spotlight occasionally - usually when delving around in
dark attics - so I *can* manage without it. It has to be used sparingly
anyway, because it soon drains the battery. The ring of LEDs produces a
reasonable light - but nothing like as bright as the halogen bulb (when
it's working!).

The battery is lead-acid - 6v 4Ah.

One or two people asked about actual voltages - so I've done a few
measurements.

When on charge, the battery floats at just under 8v. After removing it
from charge, and waiting an hour or two, it settles at about 6.65v open
circuit. When either the side LED or rear flasher are on, it drops to
about 6.59v. Then the front LED ring is on, it drops to about 6.51v.

When the halogen is switched on, the battery drops to 0.14v !! So, for
whatever reason, the battery is no longer able to deliver the 9amps or
so required to power the halogen bulb - and appears to have developed a
high internal resistance.

Could that be caused by discharging it too deeply? If not, by what else?
Is there any fix other than replacing the battery?
--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.

Roger Mills wrote:

Is there any fix other than replacing the battery?

Given that a new battery (assuming NP4-6 type) is around £10 +/-2, is it
worth worrying?

On 22/04/2019 13:55, Andy Burns wrote:
Roger Mills wrote:

Is there any fix other than replacing the battery?

Given that a new battery (assuming NP4-6 type) is around £10 +/-2, is it
worth worrying?


You would, IMHO, be better of just buying

https://www.toolstation.com/nightsea...p-torch/p21740

instead of a new battery.

--
Adam

On Monday, 22 April 2019 13:48:22 UTC+1, Roger Mills wrote:
On 22/04/2019 10:42, newshound wrote:
On 21/04/2019 00:09, Fredxx wrote:
On 20/04/2019 23:32, Roger Mills wrote:

I have a Livarno Lux (Lidl) cordless spotlight - the sort with a
large diameter lens at the front, behind which is a powerful halolgen
(55w) bulb and a ring of LEDs, and with a white LED and flashing red
LED at the back.

It normally travels in the boot of my car in case of emergency, but
tends to roll around a bit - which may be related to the problem.

I recently found that it was completely dead - none of its 4 lights
would work. [You're supposed to charge it regularly since the battery
can apparently be damaged if it becomes deeply discharged. It was
working when I tested it 3 or 4 weeks ago, so it's possible that it
got turned on while rolling around (don't we all!) and flattened its
battery.]

I recharged it for over 24 hours, and the battery's open circuit
voltage is well above its rated 6v. Three of the 4 lights now work,
but the 55w halogen doesn't. I've tested the bulb on a bench power
supply, and it lights up ok - but in the lantern, nothing. It's
drawing several amps but not lighting - or even getting warm, so I
don't know where the energy is going.

55w at 6v equates to over 9amps, so the filament resistance is only
about 2/3 of an ohm when hot - even lower when cold. Any additional
resistance in the circuit will have a dramatic effect on the current,
and probably stop it lighting.

Question to those who are knowledgeable about rechargeable batteries
. . .
What sort of "damage" is likely to result from being discharged too
deeply? Is it possible that this could increase its internal
resistance? If so, is there any remedy - or is it scrap?

What's the battery volts when the halogen is turned on?

I'm thinking the battery is happy to power the LEDs but drops all its
volts when connected to a 'cold' halogen bulb with a very low resistance.

My thoughts too. Also, what sort of battery is it? Do you *actually*
need a spotlight? I reckon those "work" floodlights are usually much
more useful, they are LED and lithium ion and hence very efficient.
Could you replace the halogen with some sort of LED?

I only use the spotlight occasionally - usually when delving around in
dark attics - so I *can* manage without it. It has to be used sparingly
anyway, because it soon drains the battery. The ring of LEDs produces a
reasonable light - but nothing like as bright as the halogen bulb (when
it's working!).

The battery is lead-acid - 6v 4Ah.

One or two people asked about actual voltages - so I've done a few
measurements.

When on charge, the battery floats at just under 8v. After removing it
from charge, and waiting an hour or two, it settles at about 6.65v open
circuit. When either the side LED or rear flasher are on, it drops to
about 6.59v. Then the front LED ring is on, it drops to about 6.51v.

Those are all healthy voltages

When the halogen is switched on, the battery drops to 0.14v !! So, for
whatever reason, the battery is no longer able to deliver the 9amps or
so required to power the halogen bulb - and appears to have developed a
high internal resistance.

Could that be caused by discharging it too deeply? If not, by what else?
Is there any fix other than replacing the battery?

Battery knackered, obviously. Sitting around discharged is fatal to lead acids. It might be worth a go discharging it to about 3.5v then immediately pulse charging it. A variant of that method was used a fair bit back in the 50s to get car batteries good enough to sell the car. You need a charger with recondition mode of course - or could do it the old way, but those setups tended to be a hazard.


NT

On 22/04/2019 18:45, wrote:
On Monday, 22 April 2019 13:48:22 UTC+1, Roger Mills wrote:


Could that be caused by discharging it too deeply? If not, by what else?
Is there any fix other than replacing the battery?

Battery knackered, obviously. Sitting around discharged is fatal to lead acids. It might be worth a go discharging it to about 3.5v then immediately pulse charging it. A variant of that method was used a fair bit back in the 50s to get car batteries good enough to sell the car. You need a charger with recondition mode of course - or could do it the old way, but those setups tended to be a hazard.


NT

Could be worth a try. The only charger I have is the wallwart which came
with it. What is the 'old' way - manually switching it on and off? If
so, at what frequency?
--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.

"Roger Mills" wrote in message
...
On 22/04/2019 10:42, newshound wrote:
On 21/04/2019 00:09, Fredxx wrote:
On 20/04/2019 23:32, Roger Mills wrote:
I have a Livarno Lux (Lidl) cordless spotlight - the sort with a
large diameter lens at the front, behind which is a powerful halolgen
(55w) bulb and a ring of LEDs, and with a white LED and flashing red
LED at the back.

It normally travels in the boot of my car in case of emergency, but
tends to roll around a bit - which may be related to the problem.

I recently found that it was completely dead - none of its 4 lights
would work. [You're supposed to charge it regularly since the battery
can apparently be damaged if it becomes deeply discharged. It was
working when I tested it 3 or 4 weeks ago, so it's possible that it
got turned on while rolling around (don't we all!) and flattened its
battery.]

I recharged it for over 24 hours, and the battery's open circuit
voltage is well above its rated 6v. Three of the 4 lights now work,
but the 55w halogen doesn't. I've tested the bulb on a bench power
supply, and it lights up ok - but in the lantern, nothing. It's
drawing several amps but not lighting - or even getting warm, so I
don't know where the energy is going.

55w at 6v equates to over 9amps, so the filament resistance is only
about 2/3 of an ohm when hot - even lower when cold. Any additional
resistance in the circuit will have a dramatic effect on the current,
and probably stop it lighting.

Question to those who are knowledgeable about rechargeable batteries
. . .
What sort of "damage" is likely to result from being discharged too
deeply? Is it possible that this could increase its internal
resistance? If so, is there any remedy - or is it scrap?

What's the battery volts when the halogen is turned on?

I'm thinking the battery is happy to power the LEDs but drops all its
volts when connected to a 'cold' halogen bulb with a very low
resistance.

My thoughts too. Also, what sort of battery is it? Do you *actually*
need a spotlight? I reckon those "work" floodlights are usually much
more useful, they are LED and lithium ion and hence very efficient.
Could you replace the halogen with some sort of LED?

I only use the spotlight occasionally - usually when delving around in
dark attics - so I *can* manage without it. It has to be used sparingly
anyway, because it soon drains the battery. The ring of LEDs produces a
reasonable light - but nothing like as bright as the halogen bulb (when
it's working!).

The battery is lead-acid - 6v 4Ah.

One or two people asked about actual voltages - so I've done a few
measurements.

When on charge, the battery floats at just under 8v. After removing it
from charge, and waiting an hour or two, it settles at about 6.65v open
circuit. When either the side LED or rear flasher are on, it drops to
about 6.59v. Then the front LED ring is on, it drops to about 6.51v.

When the halogen is switched on, the battery drops to 0.14v !! So, for
whatever reason, the battery is no longer able to deliver the 9amps or so
required to power the halogen bulb - and appears to have developed a high
internal resistance.

Could that be caused by discharging it too deeply?

Yes. Lead acid batterys dont like that unless designed to be
deep discharge batterys and that battery is very unlikely to be.

If not, by what else?

Leaving it flat.

Is there any fix other than replacing the battery?

Replace the whole thing with one that uses a
high intensity led for the spotlight function.

On Tue, 23 Apr 2019 07:05:24 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH senile troll****

And you HAD to **** also in this thread, eh, you senile pest?

--
"Anonymous" to trolling senile Rot Speed:
"You can **** off as you know less than pig **** you sad
little ignorant ****."
MID: