How to Test a Laptop Battery - Ec-Projects

In this video I measure the capacity of a labtop / notebook battery. To be able to draw current from the battery, there is a little trick you will need to do, that is also shown in the video.
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[firstmkb]

Perfect video! I just wanted to check new battery voltage before putting it in an old laptop to check if it was charging. The pin out observation alone was worth the video!

[felipeabad]

Hello thank you for your video, did you make measurements with or without powering on the computer?? regards

[jasonbrown]

i dont understand why anyone would thumb this down, is it because there is no music, no explosions, no exaggerated silly faces in the thumbnail?

[ministeriomundialliberando]

Thank you. I have seen many videos teaching that you only have to connect the battery out/input to a cherger to charge it, but it is a fake, because as you have shown here one have to active it.

[soupinacan]

this is a great vid with alot of useful stuff. thanks for posting.


0:53 lmao am i the only one who got scared of him spazzing out here?

[sreenivasdevarasetti]

thnaks for the explanation to find the battery Ah...am impressed the way explained....
just wanted to ask out of curiosity, are we can use that "+ & -" two pins for reverse charging rather connecting 3rd/4th wires to the laptop battery?, becoz there will be BMS board present in the battery already...

thanks in advance

[BalkanskiSpijun-]

I watch this video every time I can't fall asleep.

[ggattsr]

Just found your channel. I really enjoy your detailed approach to electronic trouble shooting. Your mixture of "trial and error" with traditional troubleshooting makes for great videos. Thanks for sharing your knowledge.

[maximilianobarac]

Thanks a lot my friend, I could make a laptop battery which was not charging to star charging with your explanation!! Thanks again for sharing

[sarveshk]

At 7:47, you mentioned that the "battery will cut off automatically".
It seems it did cut off at 9.87v, that's about 3.29v per couple. Pretty safe for lithium cells.
I wish to know did it cut off automatically because of the battery's internal circuit, or because of you custom made load circuit? If that cuts off because of it's internal circuit, that would save my efforts to add protection circuit and I could directly use laptop batteries in my electronic projects. 

[hectorfmaldonado]

Hi sir, congrats for you neat project. I saw a similar solution in another video, and ever since I been looking for a more elaborated plan, and yours is perfect. Only a well centered mind can present an idea based on scientific principles. This video brings an important solution for a common problem, and it's very convenient from the ecological point of view. I will give a solid 10.

[stuarttener]

What sort of pins did you use to insert into the battery pitch? size? type? etc?

[zulkarnainkarim]

where do you get those value? 0.5167 and 2.63

[j.lietka]

great video! have you taken apart a laptop battery & replaced cells? or rebuilt a laptop battery pack? thanks

[jaykk]

Hi,
Great video !
It worked a treat on a pair of li ion batteries I had sitting around from two laptops .
Thought I am having trouble with two li po batteries I have, I found the ground jumped that with the other ground but it does not give me a reading or let me charge it like it did with the li ion's,
Any chance I can send you a pic, it is a battery for a Asus transformer tablet/laptop 2 in 1, the batteries have 8 wires, two for pos red, two for neg/ground black, well three really because green is neg/ground as well, Then there is a yellow, white and blue, all coming out of battery .
Any help would be appreciated

[wangweiggsn]

If you disassemble the battery, you will see that there are 3 batteries connected in series. After the discharge is completed, measure the voltage, replace the one with the lowest voltage, and then charge each battery individually, and it will be repaired.

[vaddieg]

Hi, thanks for your guide on finding right pin to enable workload.
Is it possible to charge battery w/o laptop? How to find right pin for charging?
Thanks

[TO-jdrg]

Can you put the link for the circuit you built in the description? Thank you.

[nolanjshettle]

no you were right. The transistor will allow 1 amp to pass through it. You just pointed at the resistor. The transistor being the active component and the resistor being the passive I wouldn't say the resistor is "allowing" anything.

[manuelcornejo]

Good video. Now a question. When a battery doesn't charge it is all the time the culprit? What about the ability of the laptop circuits to charge it? Can we test that?