stan tiers
2 Bronze

Battery charging not working

OK, yes this is an old system. 

I have a Precision M6300 (actually 2 of them).  This one has Win 7.   The battery charging is not working consistently. 

The battery is new, but NOT a Dell battery. 

Before everyone says that is the problem, NO IT IS NOT.    It is the 4th Batteries Plus battery I have used in Dell products, and all have worked fine.   In fact it is the second in this same unit, and the previous one worked fine for a long time.  It is a Ray-o-Vac product.

So, the problem is that it says it is charging, but it is not charging.  It is stuck at 38% and does not charge.   It charged fine for several days prior to this.  Does not charge whether the charging light is on or off.  Right now it is off.  If I unplug and plug in again it will charge for a few minutes and then stop charging.

AC adapter runs the computer just fine.

System diagnostics says the battery is working

System diagnostics  says that the motherboard components are fine.

Battery worked fine for several days, charging and powering the computer as it should.

Battery shows 2 lights solid green when the battery button is pressed.

I see in several posts that I should find battery info on the computer via control panel, but all I am offered is to set a power plan, there is no battery monitor as there was with the old XP OS.  So I get no information from the system, but since the diagnostics say all is well I assume that all really IS well as far as the battery and the charging system.

Suggestions?

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30 Replies
8 Xenon

RE: Battery charging not working

The questions is:  is the system recognizing the AC adapter, or is the adapter showing "unknown".  If the system doesn't recognize the adapter, it WILL power up and run but the battery WILL NOT charge.

F2 at  powerup to check the adapter status.

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stan tiers
2 Bronze

RE: Battery charging not working

And how would I know that?

The diagnostic did not indicate any such issue.   I do not get such a message.

And in any case, the adapter is a genuine Dell, so obviously it will be recognized as OK

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stan tiers
2 Bronze

RE: Battery charging not working

I should mention, it apparently decided to charge the battery, some hours later, and charged to 88% and stopped.   Then later I noticed that it seemed to be charged up, and indeed it decided to charge the rest of the way.

But it refused to charge for some time before that.   As mentioned. diagnostic shows no issue. and it is a Dell charger for the unit.

If I forget,and plug in the charger at certain times during boot, I HAVE seen a "no recognition" message.  but not if it is already plugged in at boot, or is plugged in later after boot.  Only a narrow window of time during the boot seems to cause that error, so it is not the problem here.

Your idea is aparently that the adapter/charger might be the wrong voltage.  No.  

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8 Xenon

RE: Battery charging not working

That is not my idea.  Whenever the system doesn't recognize the AC adapter, the battery WILL NOT charge.   If you haven't yet tried a new OEM Dell adapter, that's the first thing to do.  If that doesn't get and keep the adapter recognized, replace the DC power jack in the system.  And if that fails to solve the issue, replace the mainboard.

The adapter completes a charge circuit with a center wire.  If that charge circuit is not closed, the battery WILL NOT charge, even if the adapter powers the system.

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stan tiers
2 Bronze

RE: Battery charging not working

Not sure I understand you.

Since it DID charge, but NOT the way it used to, there is something different.   But the AC adapter IS a DELL unit, and the system does not complain about it.  

Diagnostics show the main board is working fine.   I am not going to replace that unless it is shown to be bad.  

Same with the AC adaptor.  It works and even charges the unit as it did today.

I am not understanding why I should replace hundreds of $$ worth of parts right now.

The big problem is that Win 7 does not seem to include the battery information that XP did.   BUT apparently it should.

So I don;t get much information about the battery or charge status.  Just the tiny icon at bottom right of screen.   Right click gets only "power options", offering different times to shut off screen.

There are many on-line suggstions about this, but all involve options that I do not have available in Win7, even though the suggestions are FOR Win 7.

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8 Xenon

RE: Battery charging not working

From your post:

"If I forget,and plug in the charger at certain times during boot, I HAVE seen a "no recognition" message. "

It sounds like the the connection between the logic wire and mainboard is not solid.  If, at any time the adapter loses that connection, the battery will stop charging.

You can downgrade all the posts you'd like, but the problem here is that the adapter is losing connection to the mainboard intermittently, which causes charging to stop.  You need to solve that problem - once it's solved, the problem will be as well.

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stan tiers
2 Bronze

RE: Battery charging not working

Sigh......

ONLY DURING STARTUP does that ever happen, when I plug in the wall plug at a certain time.

With NO OTHER CHANGE, NOT MOVING ANY WIRE, when I see that, I unplug it from the wall (not computer), and wait, then plug in again to WALL, and it charges.

Also, when it says it does not recognize the charger, it not only will not charge, it also will not boot,  but it works fine if I reboot on battery and wait longer before I plug in to the wall.   Or if I plug in first and then boot.  NEVER SEE that message if I eitehr plug in first or wait until booted to plug in.  

If I wiggled the wire, yes I would consider your statement true.

I know you are TRYING to be helpful.....

What I want to know is why does win 7 NOT SHOW the laptop battery info that it supposedly  should?

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stan tiers
2 Bronze

RE: Battery charging not working

Also, in every case it STATES that it is charging, but does not charge in fact.   If the computer did not get the power on that pin it would state "plugged in NOT charging".

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8 Xenon

RE: Battery charging not working

IF you're certain the system makes good contact with the adapter - no warnings about unrecognized adapters, AND one battery does work and one doesn't, then the battery that doesn't work is bad.

If you have two systems and just one battery, if that battery works with one system and not the other (this is what it sounds like), then it's the charging circuit on the system where the battery WON'T charge that's bad.

If ONE battery fails to work with either system, it's the battery that's bad.  

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