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Old 02-01-2012, 07:43 PM   #1
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Battery not charging...


I have an IBM T60 on which the sole OS is LMDE (Linux Mint Debian Edition)and have just purchased a new battery for it, as the old one wouldn't charge and I assumed it had reached the end of its useful life. However, the new one will not charge. I have had the laptop plugged in on power for over 8 hours and it still reports no charge, although the charging light flashes.

Can any member suggest a possible cause. What parts should I look at having tested/replacing?
Old 02-01-2012, 08:39 PM   #2
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I would start by metering the charging contacts in the battery compartment for current and voltage to make sure that the charging circuit is working.

I would also meter the battery positive and negative terminals for continuity within the battery.

You should be able to do this with computer turned off; every laptop I've seen continues to charge the battery even while it's powered down.
Old 02-01-2012, 08:52 PM   #3
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Doubtful but it could be the power supply. I've had some Dell laptops where the power supply could power up the unit but the battery would not charge.

Testing the battery as suggested in the previous post will give us an idea if this was the case.

Last edited by michaelk; 02-01-2012 at 08:53 PM.
Old 02-02-2012, 03:15 PM   #4
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Thank you frankbell and michaelk for your prompt replies. However there is a slight snag in that I am not very apt at testing electrics. Can you give me step by step instructions, please?
Old 02-02-2012, 10:24 PM   #5
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battery testing

Testing battery charging dock on a laptop

Things of need:

digital voltage tester (I recommend a non-contact dc tester (google search: non-contact dc tester with lcd) read CAUTION)


The power in a laptop is DC and low voltage (specific voltage readings are based on the output of the ac adapter (ac to dc converter))
Read your ac adapter and verify what the output voltage is (mine is 18.5v). This will be the voltage number your looking to see on your tester.


Testing the ports on an ac adapter output or the battery charging dock port must be done with caution. The negative and positive points of contact are close together. If the test is performed with a traditional voltage tester that has a red lead and black lead, there is potential for crossing the two lead ends and ultimately shorting out the circuit.

But with a non-contact dc tester the risk eliminated.

Test 1a:

Verify the tester is set to dc. We want to test the dc output port coming from your adapter to verify the voltage matches the label. With a traditional tester touch one lead to the inside of the port and one to the outside of the port. If the voltage matches or is in close proximity to the label then we are good. If not that will be your problem (even if it is off by 2-3volts). If the battery charger is not getting the proper voltage it will not work correctly.

Test 1b:

Same test but done with a non-contact tester. Simply put the tip of the tester near the port of the ac adapter. Again if the voltage is incorrect that is the problem.

Test 2a:

Tester set to dc. Testing the battery charger port. We need two points of contact red lead / black lead. But it is tricky to explain without seeing the port itself. My hp pavilion zv6000 has a slotted port (looks like this |||||||| ) that the battery inserts into. Some pc's can have just a two point contact, one positive one negative. That is easy to test, your red lead goes to one contact and your black lead will go to the other. Again proceed with CAUTION not to cross/touch your lead ends. If the voltage matches the label on your ac adapter output voltage your good. Otherwise there is a problem with your power board. Power boards are fairly cheap.

If your battery charger port looks like mine, this is how I would go about trying to find the voltage. That is not knowing witch ones were positive or negative.

Lets say this is the port |||||||||

I would start with one tester lead at the first terminal slot in that port like this


Then I would put the next lead just to the right of that


If I detected no voltage I would proceed with moving the second lead to the right one terminal at a time till I received a reading.

Test 2b:

Test the battery charger port with a non-contact dc tester. Simply put the tester end near the battery charger port. Same as test 2a if the voltage is correct your good, otherwise look into getting a new power board. You may want to open the laptop in order to verify the model number for that board.


This is not the best tutorial by any means but I hope it helps. If your voltage is good on both the ac adapter and the battery charger port then we are talking about a software problem. From my research there was a bug in the battery monitoring software in gnome and upower for linux mint whether debian or ubuntu. There is multiple fixes/workarounds/patches lol. I run linux mint 12.

Post back with your findings. We will try to help out on the next step or questions.

Old 02-04-2012, 03:15 PM   #6
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Thank you Neqtan for your prompt reply and excellent instructions. I will work through them and report back with the results.


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