Everything about batterys, diagnosis, testing and charging 

You know Sorin is a good man when he is willing to help his competition 3 stores down. I learned so much from this video. Thank you for being an honorable man, Sorin.

Just brilliant. So educational. Some of us just love trouble shooting and repairing - but sadly don't have such knowledge. These tutorials are priceless. Thank you so much.

I want to thank you for your shares. your videos, unlike many "tutorials", put you in the situation to really understand the repair process, it really seems to be inside your laboratory. your knowledge on the internet is like gold and you, my dear, represent the essence of a web that can become a very powerful learning tool. compliments :)

Thanks for all the info. People like you make RU-vid all worth it.

one of the best teacher in the world

this was good lesson..watching him do so many ..i eventually understood.

Good job ! Really appreciate you're channel! This is the easy way and best way to check the batteries. Thanks

This is the proper way to tell if the battery is good or not, i am sure that i've watched another video when you test batteries but i found this one hiding from me somehow in your old videos playlist lol thanks a lot for all these great video lessons

Love your videos! keep the good work!

This video is very valuable. Thank you, sir.

In order to properly test a battery or charging system... you must load test. I thought you might go that route at the beginning. The charging test you did is a great quick check method. But as you're saying for a detailed battery analysis, the battery must be cycle tested. Measure the voltage drop on a load test, measure the charging capacity (time & rate), as well as the discharge time and output. Those are the ingredients for proper battery condition methodology.

Your a great master , and I am thanks of you , no one did explain me batteries as good as you

Thank you for this video again sir! I salute!!!

almost every video is a lesson, thank for sharing. a big thank. i want to see under microscop what do when u check if board is ground or not, sometime u check if board is ground but not under microscop and we can't see where u put the multimeter or the power supply cause we are noob. please continu to share with us, we love learn without shematics... we love to learn electronics things,... And more ; i'm french, but i understand every word, cause u speak like me, slowly, with simple words. Thanks, continue to share, we are a lot behind the screen and you are a teacher for us

Hello Sorin, thank you so much!

Great video, thank you very much!

Nice method for checking battery Personally I use ampere meter to check it but know I learn a new way Thank you very much

I really appreciate your videos. Thank you.

Another good video. Thanks for your effort!

Thanks man for the knowladge share..your the best

I know now how to test batteries, thanks to you. Thanks again

That's a nice job! Sad that we lost you from our country... I may have needed your knowledge and skills with a Clevo Laptop now that it's not charging the battery (but the led is orange, like charging). But, hopefully, I may have learned one or two things from you, and i hope i'll repair my laptop, a problem that i personally created shorting something on the motherboard when trying to unplug fan with something metallic. My bad... Thank you for opening my mind!

You can never ever fail to amaze me Sorin, I think you were born a genius🎉🎉🎉🎉🎉

best video ever.thenks for lesson sorin

When i had my repair shop the way we tested the fake battery with original one was to put _on + and +on _ on the battery ,if the power supply shows 0 current the battery was original, but if the battery shows any number the battery was fake. That worked for us very well.

i LOVE YOUR WORKING AND YOUR ISPLAN

thank you for long and quality video my friend i learn a lot from you thanks again god blace u

Hi Sorin.. Is it possible for a faulty battery to cause a motherboard to fail?.. Immediately after replacing an old battery, with a new third party battery, the laptop failed to start, and all LED lights failed to light up.. Multimeter shows that the power adapter voltage is good, and also that the power to the motherboard is good... discharging the laptop and connecting only power supply, doesn't fix it.. still no start up, and no LEDs (2 minute hold on power button for discharge with adapter and battery removed).. what are your thoughts?

good video and thanks for the awesome solder paste best i have ever used smells good also

nice video sir

Thanks Sorin!

you are the best!!

appreciate your video

hi Sorin many Greetings from Greece

many thanks, sir .

I dont know exactly how to calculate Battery internal resistance, but if its Ohms law , then 4V on 1A is about 4 ohm of resistance , by the way , that Resistor , doesnt look like one to me ,that looks like Ceramic Cap , metal foil cap or something , but i guess it is resistor , otherwise DC wouldn't work . Like always Sorin ( yeah i know the name ) makes good videos, no commercials , no product placement , no "unboxing videos" , no " look what i purchased videos " , just str8 electronics .

Nice one sir... i personally use amperage to check battery charging and discharging, i totally agreed how u check battery, except one... ive seen LG batterry, i been repairaing phones for bread and butter but .. LG phone BATTERY... 99.9% ur method wont work.... anyways ur channel is very intertaining and u do the job.... keep it...

thanks for knowledge. you are great. have a nice day. sincerely.

Wow bro you are great at what you doo

I love dis video

Thanks a lot

So if an old battery has higher resistance, it must tend to heat up when trying to charge ? Hay that new battery checker rejuvenator device you show'd us ( in another video ), I went to the site to buy a this rejuvenator they say they where back ordered and wrote a contact note to them and they never got back to me.

when i see those old nokia batteries i know he is been doing repairs for long time )

🙏 thanks a lot sorin. Pls do video on How the Laptop BMS works the and connected Li-ion batteries works and how to identify bad cells amon to them. Thanks 🙏

You the best🙌🙌

as always great explanation. I'm trying to find the Video where Sorin plugged different chargers to laptops showing nothing bad will happen if the specs are not the same.Does anyone know which video it was?

Thanks my friend, but I really laughed when you tested like 30 batteries to find 1 bad and they were all good !

I See in the Carrier bag blackberry battery ^^ propably for blackberry 9900 :) i love repair blackberry phones.

I like her u explain things here to us may GOD bless u sir 🙏 pls the other videos u did about small phones I am In nigeria how can i get many small old phones to sale here in nigeria

does this tecnique apply to NI-MH batteries too ? can we check the same way for example 7.2v ni-mh batteroes for toy boats?

Thank you for this video, it's very useful! Did you limit the volts and let the PSU decide on amps by the battery draw or did you limit amps and let PSU decide on volts? Or let him decide on both by himself? Sorry for confusing question, lol, my lab supply is acting a bit differently so I'm not sure by watching yours :)

Hello sorin, guys, wishing to all a healthy new year! I need to transfer my data from a cell phone who's battery is bad(can't charge). How could i put direct power on it safely by soldering some bridges?

Hi again Sorin and community, as I m trying to charge the Li-ion using digital Power supply, it beeps for Short circuit. Is it the battery or the psu ? Thanks

Hello there. To your studies where you do battery and USB cable tests; can you add subtitles? I enjoy following your work. The subtitles help us to understand you partially. We predict the result you will reach by guessing the parts we do not understand from the video. I wish you continued work. Kind regards

Would you have a recommendation on a cheap linear power supply ?

It's the voltage that caused the charge controller to cut out?

Some of those batteries were 4.4v full charge voltage

cred ca cea mai buna metoda de a stii daca bateria e buna este aceea de a observa daca incarcata full se autodescarca in timp (sa zicem 2 saptamani).Autodescarcarea asta tine de rezistenta interna a batriei, cu cat aceasta e mai mare, cu atat se va descarca mai repede.

That's why you should use your bench PSU.

At 1:04:35 you saved a battery that was not good. You looked at Voltage going to 3.9v, but was not taking Amps... It was 0A... Was that really ok?

so if with 2.0A have 4.0v or something around that ,then we must have with the multimeter 3.7,3.9 or something higher than 3.6. if we have 2.0A and 4.6v and with multimeter have 3.2v then we have a faulty battery am i right?

i SEEN YOUR ALL VIDEOS

Gud mornink!

ALWAYS YOU ARE THE BEST, Can we use the same method to test LAPTOP batteries?

What do you do with all those batteries?

Also, I have one more question... From what I understand if a battery is new, the values between charging and testing w multimeter should be very close. If it's new, new, not forgot on the shelf. Then, considering that what I said is true (if you can verify or know), if you attach a capacitor to a 40% battery that has 4.5v charging @2Amps and 3.7v testing with multimeter (FOR EXAMPLE)... if you choose the right capacitor, can you somehow smooth it back, like in a dodgy way... (In an example, that, if you could - 'cuz clearly you cannot attach it in a phone that's perfectly enclosed (with no space left). What are your thoughts on this? Wikipedia... "The more a capacitor is charged, the larger its voltage drop" "The current alters the charge on a capacitor, just as the flow of water changes the position of the membrane. More specifically, the effect of an electric current is to increase the charge of one plate of the capacitor, and decrease the charge of the other plate by an equal amount. This is just as when water flow moves the rubber membrane, it increases the amount of water on one side of the membrane, and decreases the amount of water on the other side." I'm trying to get to a solution to fix the internal resistance of batteries... If you open them, instead of adding a capacitor... Does battery have a physical resistance inside, in the circuit? Or are you saying that the batteries themselves in time create or retain resistance?

Look at all the cellphone batteries you have - wow

Is it worthy to change one or two defective cells in a laptop battery or buy new one?

Nice video regards pa3dee

what is the name of your power supply u r using i want to purchase it from my nearby market

its 20:8 at night now i made it 1:15:31and I'm going to finish the video

Can we use the same method to test iphone batteries?

we understand that if high internal resistance the voltage will be higher....and low internal resistance the voltage will be lower.. the big question ..which didnt get answered was....what is high voltage ..and what is low voltage... he just assume we know that 4.6 volts is to be classed as low and 6.7 volts is to be classed as high if i have different battery.....maybe bigger ...maybe low is 9volts and high is 12 volts.. how to know this ?

Heheh, what Sorin forgot, is that under that plastic piece of the battery, there is a charging protection circuit. The last protection for battery, and you can just cut it out and use battery two leads plus and minus and charge, all the way. Its not always the battery that's wrong itself, sometimes its the battery circuit. under the plastic.

instead of PSU you can use ESR meter i think

Whenever I try this, my voltage always stays constant at whatever I set it to (4.2) and the current varies every time. I can't get a constant 2A. Am I doing something wrong?

The real Battery Doctor...

Can chip installed in heuman body?

Lower voltage better batt got it

Better way is check by resistor and without resistor....

Put a load will tell ?

You activate the siri on iPad at 21:20

just wondering where you from?

7:18

Actually, that looks like a capacitor to me not a resistor.

please add subtitel

Bms

im sorry I love you but to much time on a battery, it works or it does not. if not get a new one.

That is CAPACITOR !!!!!!!!!!!Not a resistor !!!!!!!!!!!!!!!!!!