NCR18650PF showing as NiMH on my VC4

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Wrathbringer27
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NCR18650PF showing as NiMH on my VC4

Guys any clue what happened to my battery? It wont work any flashlight too

Update: Didn’t work on the nitecore. Put it back in the VC4. Started charging as NiMH. Will see if it pulls through…

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Edited by: Wrathbringer27 on 09/09/2015 - 10:11
adnj
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I would use a dvm and check the battery voltage. I suspect that the voltage is low, maybe about 1 volt.

D10ten
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You probably drained the battery to around 1.0v so your charger think it is a NiMH. If that is the case, it dropped below the recommended 2.50v. Do you have a meter to check the voltage?

Wrathbringer27
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nope…. i only hv my VC4 Sad I accidentally mixed up my PF with my B in my K40M

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Wrathbringer27
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hmm i’ll try to see if my nitecore i2 can help jumpstart the battery

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SIGShooter
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If the battery was drained below 2volts you might want to consider tossing it.

hank
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Consider tossing it into the appropriate recycling bin (and keep it in a metal box outdoors until you do).
And remember don’t inhale if it vents. Yeah, it’s unlikely to fail dramatically after draining to 1V. But it’s much less likely to recover to a useful condition.
When the gambling gives you either “nothing good” or “something bad” — why bother?

mongoose
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hank wrote:
Consider tossing it into the appropriate recycling bin (and keep it in a metal box outdoors until you do).
And remember don’t inhale if it vents. Yeah, it’s unlikely to fail dramatically after draining to 1V. But it’s much less likely to recover to a useful condition.
When the gambling gives you either “nothing good” or “something bad” — why bother?

Very well put! I’ll remember that one myself Smile

homer

Wrathbringer27
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aw man thats sad Sad I guess I’ll have to dispose it then

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so can bones.

mongoose
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At least you’re not loosing a fully charged battery…….if that helps!

homer

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mongoose wrote:
At least you’re not loosing a fully charged battery…….if that helps!

NOT AT ALL HAHAHA It was first use :/

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mongoose
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Wrathbringer27 wrote:
mongoose wrote:
At least you’re not loosing a fully charged battery…….if that helps!

NOT AT ALL HAHAHA It was first use :/

Now i feel sad for it, only one use. At least it died a proud death, powering a flashlight! Last Post anyone? :_(

homer

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You’re nitecore may bring it back. I had two separate lap top pulls and the ones that only read 1 volt are holding voltage better than the others that read 3.7. And it’s an excuse to get a voltmeter.

Dustin

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dudunphy wrote:
You’re nitecore may bring it back. I had two separate lap top pulls and the ones that only read 1 volt are holding voltage better than the others that read 3.7. And it’s an excuse to get a voltmeter.

From everything I’ve read lithium cells suffer internal damage when discharged to very low levels (such as internal shorts). Maybe nothing will ever happen but for me it’s not worth the $10 or so to take the chance of experiencing an exciting, and dangerous, event Sad
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SIGShooter wrote:
dudunphy wrote:
You’re nitecore may bring it back. I had two separate lap top pulls and the ones that only read 1 volt are holding voltage better than the others that read 3.7. And it’s an excuse to get a voltmeter.
From everything I’ve read lithium cells suffer internal damage when discharged to very low levels (such as internal shorts). Maybe nothing will ever happen but for me it’s not worth the $10 or so to take the chance of experiencing an exciting, and dangerous, event Sad

Yes I suppose it’s not worth a mini explosion in your house. I thought I had read that you could bring them back if you had the right charger. I probably need to do some more research. Thanks Sig!

Dustin

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dudunphy wrote:
SIGShooter wrote:
dudunphy wrote:
You’re nitecore may bring it back. I had two separate lap top pulls and the ones that only read 1 volt are holding voltage better than the others that read 3.7. And it’s an excuse to get a voltmeter.
From everything I’ve read lithium cells suffer internal damage when discharged to very low levels (such as internal shorts). Maybe nothing will ever happen but for me it’s not worth the $10 or so to take the chance of experiencing an exciting, and dangerous, event Sad

Yes I suppose it’s not worth a mini explosion in your house. I thought I had read that you could bring them back if you had the right charger. I probably need to do some more research. Thanks Sig!


The xtar vc4 claims to be able to rescue your over discharged batteries.

homer

SIGShooter
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mongoose wrote:
dudunphy wrote:
SIGShooter wrote:
dudunphy wrote:
You’re nitecore may bring it back. I had two separate lap top pulls and the ones that only read 1 volt are holding voltage better than the others that read 3.7. And it’s an excuse to get a voltmeter.
From everything I’ve read lithium cells suffer internal damage when discharged to very low levels (such as internal shorts). Maybe nothing will ever happen but for me it’s not worth the $10 or so to take the chance of experiencing an exciting, and dangerous, event Sad

Yes I suppose it’s not worth a mini explosion in your house. I thought I had read that you could bring them back if you had the right charger. I probably need to do some more research. Thanks Sig!


The xtar vc4 claims to be able to rescue your over discharged batteries.

From reading their marketing stuff all that means is that it can reset protected batteries. See this

I doubt any charger can undo internal shorts.

mongoose
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SIGShooter wrote:
mongoose wrote:
dudunphy wrote:
SIGShooter wrote:
dudunphy wrote:
You’re nitecore may bring it back. I had two separate lap top pulls and the ones that only read 1 volt are holding voltage better than the others that read 3.7. And it’s an excuse to get a voltmeter.
From everything I’ve read lithium cells suffer internal damage when discharged to very low levels (such as internal shorts). Maybe nothing will ever happen but for me it’s not worth the $10 or so to take the chance of experiencing an exciting, and dangerous, event Sad

Yes I suppose it’s not worth a mini explosion in your house. I thought I had read that you could bring them back if you had the right charger. I probably need to do some more research. Thanks Sig!


The xtar vc4 claims to be able to rescue your over discharged batteries.

From reading their marketing stuff all that means is that it can reset protected batteries. See this

I doubt any charger can undo internal shorts.


I read the link and i don’t think thats what they mean. They claim their chargers can detect the battery voltage when it has been over discharged, which, correct me if i am wrong, would be impossible if a pcb had tripped. Seems to me that what d10ten posted earlier about the charger confusing the li-ion battery for a ni-mh battery is what’s happened, the voltage dropping so low. The good thing is that Wrathbringer never came to any harm, assuming the batteries were imbalanced Smile

homer

SIGShooter
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mongoose wrote:
SIGShooter wrote:
mongoose wrote:
dudunphy wrote:
SIGShooter wrote:
dudunphy wrote:
You’re nitecore may bring it back. I had two separate lap top pulls and the ones that only read 1 volt are holding voltage better than the others that read 3.7. And it’s an excuse to get a voltmeter.
From everything I’ve read lithium cells suffer internal damage when discharged to very low levels (such as internal shorts). Maybe nothing will ever happen but for me it’s not worth the $10 or so to take the chance of experiencing an exciting, and dangerous, event Sad

Yes I suppose it’s not worth a mini explosion in your house. I thought I had read that you could bring them back if you had the right charger. I probably need to do some more research. Thanks Sig!


The xtar vc4 claims to be able to rescue your over discharged batteries.

From reading their marketing stuff all that means is that it can reset protected batteries. See this

I doubt any charger can undo internal shorts.


I read the link and i don’t think thats what they mean. They claim their chargers can detect the battery voltage when it has been over discharged, which, correct me if i am wrong, would be impossible if a pcb had tripped. Seems to me that what d10ten posted earlier about the charger confusing the li-ion battery for a ni-mh battery is what’s happened, the voltage dropping so low. The good thing is that Wrathbringer never came to any harm, assuming the batteries were imbalanced Smile

I read it more carefully and they’re probably talking about reduce level charging the cells until they’re somewhere around 2.5volts and then charging them normally. But the my point still stands that I’d toss the cell because “rescuing it” by no means eliminates any damage to it.
dudunphy
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All I know is when I stuck those really drained batteries in my d4 it brought them back to 3. something volts really quick and got them charged with very little heat coming from them. So maybe I lucked out. Smile

Dustin

Wrathbringer27
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When I placed the battery in the vc4 it shows as NiMH and then shows 0V. Tries charging but will always return to null.

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dudunphy
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Sad toasted

Dustin

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I wonder if it is protected. Because I might rip the protection off and see if the cell is still in healthy voltage.

if not just throw it away

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Wrathbringer27
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No protection. i don’t like pcb. my sis was using the light. thats why that happened…

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marcl
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You really should find a multimeter and test the voltage, just in case it’s fine and for some reason the charger has a problem.

Throw away nothing until you verify that its faulty.

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It’s a lesson you have to pay: “Don’t give any tech that you care about to a woman” Wink
Or it might be that your K40M is faulty!

 

Wrathbringer27
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Sirius9 wrote:
It’s a lesson you have to pay: “Don’t give any tech that you care about to a woman” Wink
Or it might be that your K40M is faulty!

nah its got nothing to do with the light. i accidentally mixed up 2 NCR18650B with a single NCR18650PF… I would replace the batteries every half hour of use. but since my sisters were using it till the higher high output were low i guess thats where the fault is… Sad

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Wrathbringer27
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marcl wrote:
You really should find a multimeter and test the voltage, just in case it’s fine and for some reason the charger has a problem.

Throw away nothing until you verify that its faulty.


Nothing has been dispose of as of yet…. I don’t own a multimeter, and the charger is fine.. Smile

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Sirius9
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Wrathbringer27 wrote:
Sirius9 wrote:
It’s a lesson you have to pay: “Don’t give any tech that you care about to a woman” Wink
Or it might be that your K40M is faulty!

nah its got nothing to do with the light. i accidentally mixed up 2 NCR18650B with a single NCR18650PF… I would replace the batteries every half hour of use. but since my sisters were using it till the higher high output were low i guess thats where the fault is… Sad

Yes, but how can you explain that the low voltage warning was not activated on the light!. I thought you can’t use K40M “till the higher high output were low” you should get some warning before that! no? Also how do you explain that mixing B and PF cells would cause so huge load and drainage on PF cell!

 

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Xtar SP1 also claims to resque over discharged batteries.

http://www.xtarlight.com/05-chanpin/p-001-1.asp?styleid=293

And it will not “diagnose” your batteries to be NiMH, because it’s a LiIon-only charger.

edit: and maybe M4D M4X can give you a coupon to ease the pain.

You are a flashaholic if you are forced to come out of the closet, to make room for more flashlights.

Wrathbringer27
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Sirius9 wrote:
Wrathbringer27 wrote:
Sirius9 wrote:
It’s a lesson you have to pay: “Don’t give any tech that you care about to a woman” Wink
Or it might be that your K40M is faulty!

nah its got nothing to do with the light. i accidentally mixed up 2 NCR18650B with a single NCR18650PF… I would replace the batteries every half hour of use. but since my sisters were using it till the higher high output were low i guess thats where the fault is… Sad

Yes, but how can you explain that the low voltage warning was not activated on the light!. I thought you can’t use K40M “till the higher high output were low” you should get some warning before that! no? Also how do you explain that mixing B and PF cells would cause so huge load and drainage on PF cell!

ctually i have no idea… it worked for me maybe my sister ignored it but only returned the light once it couldnt produce enough light

Words can be broken,
so can bones.

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