Salutare Sorin! This exact problem happened to me on my work laptop (T14s Gen 4), but it had a reset switch for the EC chip. I pressed it for 10 seconds, and it revived itself.
Usually, I pull out the leads on the bad battery and solder them on the new one, so I save the connector as factory made. Of course, I have a spot welder for the purpose.
Thank you Sorin for all the Knowledge , you motivated me a lot to learn more about electronics and repairs. I think you should also consider doing online lessons for beginners and we will pay for your time ! . I loved your channel with wife and you told me you had to stop due to being busy with other work. But you don't have to do everything for free , you have loyal community that want you to grow your business because you helped us a lot as well
If you have voltage on the bios battery connector, you may also have current leak when the Laptop is not charging. Maybe you should measure the current from the bios battery. It should draw several Microamps.
It's just this silly design... the main battery was 2V so the bios battery was switched in to power the cmos and eventually that small battery was used up too. Most likely the laptop had some kind of bios glitch where it stops charging the main battery. I have a Toshiba Z30T-C laptop that did the same thing and could only be fixed by removing the main battery then putting it back, then the EC chip would be reset and the battery would charge again for a few weeks but the fault would happen again and again. Fortunately the manufacturer fixed the issue with a bios update.
Sorin don't you dare to take out bipping of multimeter... is music for the ears... I can't believe people that don't like it... Obviusly must not be in electronics. Thank you for all your content... You are teaching a lot of people including me. I wish I could help you more.
at 1:19 i can see you have a small hole wich is a "reset button" to reset the EC chip i suppose. i have the same problem on another lenovo. no power, no charging light. just press this button and it works again.
When you remove the bios battery, don't you have to reset bios again. My Dell laptop is many many years old and I always wondered how long the bios battery would be good for? Laptop still works excellent and fast yet..... Thank you. Good video. I always tune in to watch and learn.
You stick your tongue on the motherboard, where it hurts the most is the main power rail. If it hurst nowhere, the main power rail is shorted. Thats how Sorin did it before he had the money to buy a multimeter :) Just joking af course :) The main power rail is all over the board, just check where the biggest ceramic capacitors are.
@@levendlicht Power rails (main, CPU VRM and GPU) usually always have MOSFETS or inductors near them, they're easy to spot, just look for the biggest components :) The tongue trick works, but for me just on 9v PP3 batteries, I wouldn't do it on anything higher lol 😂
Sorin, don't be that cheap, just buy some CR2032 batteries and just reuse the wires. You can remove the metal tabs attached to the battery with pliers and then just use tape to reattach it. Also your "new battery" is kind of low, a brand new battery should have around 3.3V.
@@Mz-e1d I was not talking about that. That was a joke I know. But someone who repairs computers, should have a pack of CR2032 button batteries to replace. It is quite cheap.
Hi Sorin, would it be possible to solder new cr2032 on these leads? I tried once and it battery would not accedt solder, and when heating I permanently damage it. What would be the best approach?
You can buy CR2032 with solder tags already on them and you solder to the metal tags. It is possible to solder to any battery but you must scratch off the coating to reveal bare metal in a small area. Then add flux and quickly solder the wires without over-heating the battery.
I keep every BIOS battery from every scrap laptop as long as the voltage is still good on them. That way I always have a selection. I also remove the plugs and put the original plug from the dead battery if the pins are similar.
That's absurd as even if s battery has sufficient voltage you must understand that's because it's not under load ...when a battery is bad apply a load and check for high resistance, over time the internal resistance builds until the battery is dead also its capacitance decreases over time as well...when their dead, throw them away sheesh 🙄.
And why not just cut wires and attach normal coin battery there? Its just CR2032 usually which you can wrap wires around to new one from local shop with ex. electrical tape.
Yes right way, the different connector with hot glue Is not pro...catting wire e resolder the rigth connector Is the rigth way and not a very hard and expencive work to...
@@Timpano_Francesco_Repairs I've followed Sorin for years, he IS an expert technician that's not debatable however yes the battery he attached may have the same voltage but being smaller it may not have the same capacity....does this matter? Doubtfully considering it juices itself from the laptops voltage when powered on. The battery he had was a good battery he said, if you've ever watched him test batteries in the past you'd know he knows what he's talking about, I've seen him revive batteries from the dead 🔋 ☠️. Here I'm certain he was joking when he said he'd keep that battery, I'm sure he tossed it. He only cut the connectors and attached his good battery because he said that's the only one he had rather than the standard 2032 in that laptop. That laptop will work fine, "proper good " no harm and no foul. But I took understand many that hasn't been in this business 20+ years would frown on swapping different components or flicking off a bad capacitor without replacing it but once you have had skin in this game for years and your an advanced in electronics components and repair methods you too will understand there's simply no need to waste customers time and/or money to order something as simple as a small lithium battery that will do the same thing the one on hand that's smaller with less capacity will do. 🔩⚡
I don't now if Samsung is still the same, But I had a tablet SM-T520 which if the battery was too low it wouldn't engage the charging circuit or run on usb power. I had to charge the battery with my power supply to correct the problem, which happened numerous times.
Dear brother watching yours videos and likes your videos Brother i have lenovo thinkpad p53 its charging when its off when its turn on its not charging i dont have original charger may be that is problem Because orignal charger amp 11.5 my charger is 7 amp please let me know some thing about that Thanks alot
The battery drains faster when people use their laptop as a laptop. I always run my computers on the mains adapter. Then the battery lasts longer. I only need a laptop battery if I can turn everything off when the computer shuts down. The battery protects my operating system so that everything is shut down properly when work is finished.
Problem is, by the time you NEED the battery, its wear level has dropped too low if you keep it on mains! My Dell 7390 battery has gone from 20% wear to 70% in just over a year. I hate non removable batteries, you can't easily swap spares out like you could older ones.
LifeSaver Video! When you measure the BIOS battery, the voltage is dropping constantly. You measure 0.5V without the battery inserted. In this case, I think this job could potentially become a recurring issue in the future. My question is: Should there be a higher voltage to keep the BIOS battery alive for a longer time?
The voltage at the bios battery (when flat) was coming from a transistor. There will be a circuit connected that switches when the main battery is low and then the bios battery can power the cmos. This little battery is only there to keep the settings when the main battery is changed. It is not there to hold the cmos settings in normal use over a long period. It can supply power to the cmos for maybe a few hours at most, but in normal operation the bios battery is disconnected from the circuit by a transistor or something similar and is not used at all.
Hi Sorin I saw that some colleagues on UA-cam have voice translation in all languages(italian please), you can activate it too in the following videos. Thanks
I hope before closing up that laptop that you tightened down the USB port cable whose connector you unlocked at 1:49 . Personally I replace laptop batteries that are 3 volts or less with new batteries. They are cheap enough on eBay and there is less chance of the laptop coming back and biting you in the rear.
I think in general I would not say charging a battery with any voltage is ok. You need to understand batteries, than it is safe to do, but even that case I rather limit the voltage. Li-ion cells over voltage is dangerous. When you try to charge a fully charged battery with high voltage and 3 amps, you can overvoltage the cells. BMS will prevent it probably, but if there is a minimal chance of an accident I rather not advise to do it.
Yes. All "non-rechargeable" batteries (power cell) are rechargeable. They just don't want you to know it. But the amount of power required to charge them is not very efficient, such that if you want a rechargeable battery, it's better for the amount of electricity it takes to recharge them, to use rechargeable batteries. Also once those batteries get old and weak, they won't hold much of a charge anyway. Also recharging "non-rechargeable" batteries requires a much more attention to battery temperature.
I think you are a bit wrong about the bios battery, it is used pretty much all the time, but the current is so small that they typically lasts for 10 years, usually longer than a normal lifetime of a computer. Perhaps there is another fault using too much current from the bios battery?
No, there is a circuit that disconnects the bios battery and it is not used except when the main battery is low or missing. It is there only to save cmos settings when changing out the main battery. This problem happened because the main battery was low and not charging due to a EC chip glitch.
Some laptops from years ago (I have an old Mitac 8170 Pentium 4 here in my workbench) used to use RECHARGEABLE batteries for the BIOS, and they'd charge when the mains was connected. Ahhh, they don't make them like they used to! Today's laptops are flimsy crap!
12:25 never seen 40£ cmos battery replacement this dodgy XDDDDDDD i mean different: connector size & battery size & low voltage & drowning in un-recyclable hot glue that is some real conversation starter
Thank YOU SIR And you know Raycon earbuds are making a sale on their earbuds OBVIOUSLY for the holidays and till new year's eve so why don't you contact the company and tell them to sponsor you Mr SORIN?! AND I CAN GUARANTEE YOU THAT THEY'RE ONE OF THE GREATEST AFFORDABLE EARPHONES, I WOULD NEVER TELL YOU THAT IF THEY WERE CHEAP AND NOT A GOOD PRODUCT OF COURSE NOT And thank you again and Merry Christmas Mr SORIN 😊
Lenovo is the worst laptop manufacturer.... i bought a lenovo laptop and the screen backlight is gone just because i disconnected the screen once and connected it again... Never buy Lenovo!
When disconnecting the screen connector you must FIRST remove the battery. If not the backlight fuse will blow or some other part of the screen electronics will be damaged. Everyone knows that...... except you lol
Size doesn't matter.
Watching your videos while having a cup of tea is a perfect daily dose now. Lol😂
doing just the same thing :D
real
Salutare Sorin! This exact problem happened to me on my work laptop (T14s Gen 4), but it had a reset switch for the EC chip. I pressed it for 10 seconds, and it revived itself.
Usually, I pull out the leads on the bad battery and solder them on the new one, so I save the connector as factory made. Of course, I have a spot welder for the purpose.
Do you program the battery after that?
@@mrrobot254 not needed
I was thinking that you was killing your battery untill I finished your comment. Nice idea.
Thank you Sorin for all the Knowledge , you motivated me a lot to learn more about electronics and repairs.
I think you should also consider doing online lessons for beginners and we will pay for your time ! .
I loved your channel with wife and you told me you had to stop due to being busy with other work.
But you don't have to do everything for free , you have loyal community that want you to grow your business because you helped us a lot as well
Thank you Sorin!
genius as always , love u bro...
If you have voltage on the bios battery connector, you may also have current leak when the Laptop is not charging. Maybe you should measure the current from the bios battery. It should draw several Microamps.
It's just this silly design... the main battery was 2V so the bios battery was switched in to power the cmos and eventually that small battery was used up too. Most likely the laptop had some kind of bios glitch where it stops charging the main battery. I have a Toshiba Z30T-C laptop that did the same thing and could only be fixed by removing the main battery then putting it back, then the EC chip would be reset and the battery would charge again for a few weeks but the fault would happen again and again. Fortunately the manufacturer fixed the issue with a bios update.
Sorin don't you dare to take out bipping of multimeter... is music for the ears... I can't believe people that don't like it... Obviusly must not be in electronics. Thank you for all your content... You are teaching a lot of people including me. I wish I could help you more.
Thanks Sorin, very amusing video, laughed a couple of times.
at 1:19 i can see you have a small hole wich is a "reset button" to reset the EC chip i suppose. i have the same problem on another lenovo. no power, no charging light. just press this button and it works again.
Good job mate 👏
When you remove the bios battery, don't you have to reset bios again. My Dell laptop is many many years old and I always wondered how long the bios battery would be good for? Laptop still works excellent and fast yet..... Thank you. Good video. I always tune in to watch and learn.
how do you know where the main power rail is ?
You stick your tongue on the motherboard, where it hurts the most is the main power rail. If it hurst nowhere, the main power rail is shorted. Thats how Sorin did it before he had the money to buy a multimeter :)
Just joking af course :) The main power rail is all over the board, just check where the biggest ceramic capacitors are.
@@levendlicht Power rails (main, CPU VRM and GPU) usually always have MOSFETS or inductors near them, they're easy to spot, just look for the biggest components :) The tongue trick works, but for me just on 9v PP3 batteries, I wouldn't do it on anything higher lol 😂
@@levendlicht lol thanks
Great Sorin❤
Sorin, don't be that cheap, just buy some CR2032 batteries and just reuse the wires. You can remove the metal tabs attached to the battery with pliers and then just use tape to reattach it. Also your "new battery" is kind of low, a brand new battery should have around 3.3V.
Im sure he was joking about using the old one after charging it
@@Mz-e1d I was not talking about that. That was a joke I know. But someone who repairs computers, should have a pack of CR2032 button batteries to replace. It is quite cheap.
shutup, leave him alone sori
I believe the battery is not CR2032 but a rechargeable version
You can't teach an old dog new tricks.
good work mr,sorin.. again there is scientist complaining about that battery ..
it would be nice to see you repair or replace a keybord Sorin
amazing maestro
Hi Sorin, would it be possible to solder new cr2032 on these leads? I tried once and it battery would not accedt solder, and when heating I permanently damage it. What would be the best approach?
You can buy CR2032 with solder tags already on them and you solder to the metal tags. It is possible to solder to any battery but you must scratch off the coating to reveal bare metal in a small area. Then add flux and quickly solder the wires without over-heating the battery.
I keep every BIOS battery from every scrap laptop as long as the voltage is still good on them. That way I always have a selection. I also remove the plugs and put the original plug from the dead battery if the pins are similar.
That's absurd as even if s battery has sufficient voltage you must understand that's because it's not under load ...when a battery is bad apply a load and check for high resistance, over time the internal resistance builds until the battery is dead also its capacitance decreases over time as well...when their dead, throw them away sheesh 🙄.
And why not just cut wires and attach normal coin battery there? Its just CR2032 usually which you can wrap wires around to new one from local shop with ex. electrical tape.
@@XantheFIN Exactly, I have been doing it for several years.
Yes right way, the different connector with hot glue Is not pro...catting wire e resolder the rigth connector Is the rigth way and not a very hard and expencive work to...
@@Timpano_Francesco_Repairs I've followed Sorin for years, he IS an expert technician that's not debatable however yes the battery he attached may have the same voltage but being smaller it may not have the same capacity....does this matter? Doubtfully considering it juices itself from the laptops voltage when powered on. The battery he had was a good battery he said, if you've ever watched him test batteries in the past you'd know he knows what he's talking about, I've seen him revive batteries from the dead 🔋 ☠️.
Here I'm certain he was joking when he said he'd keep that battery, I'm sure he tossed it. He only cut the connectors and attached his good battery because he said that's the only one he had rather than the standard 2032 in that laptop. That laptop will work fine, "proper good " no harm and no foul. But I took understand many that hasn't been in this business 20+ years would frown on swapping different components or flicking off a bad capacitor without replacing it but once you have had skin in this game for years and your an advanced in electronics components and repair methods you too will understand there's simply no need to waste customers time and/or money to order something as simple as a small lithium battery that will do the same thing the one on hand that's smaller with less capacity will do. 🔩⚡
I don't now if Samsung is still the same, But I had a tablet SM-T520 which if the battery was too low it wouldn't engage the charging circuit or run on usb power. I had to charge the battery with my power supply to correct the problem, which happened numerous times.
13:36 Yes, I said that to Sorin. Unfortunately, for some, size does matter 😅
if you set the power supply to 19v to charge the battery, what happens if the battery is either high internal resistance - or open?
The main battery has a protection circuit built in. Any irregular issue with cause the battery fuse to melt and it will be disconnected.
I have the issue with the exact same behaviour, should I try the same method? Hp 15da0073ms
Which PD charger do you use?
Dear brother watching yours videos and likes your videos
Brother i have lenovo thinkpad p53 its charging when its off
when its turn on its not charging
i dont have original charger may be that is problem
Because orignal charger amp 11.5 my charger is 7 amp
please let me know some thing about that
Thanks alot
The battery drains faster when people use their laptop as a laptop. I always run my computers on the mains adapter. Then the battery lasts longer. I only need a laptop battery if I can turn everything off when the computer shuts down. The battery protects my operating system so that everything is shut down properly when work is finished.
Problem is, by the time you NEED the battery, its wear level has dropped too low if you keep it on mains! My Dell 7390 battery has gone from 20% wear to 70% in just over a year. I hate non removable batteries, you can't easily swap spares out like you could older ones.
LifeSaver Video!
When you measure the BIOS battery, the voltage is dropping constantly. You measure 0.5V without the battery inserted. In this case, I think this job could potentially become a recurring issue in the future.
My question is: Should there be a higher voltage to keep the BIOS battery alive for a longer time?
The voltage at the bios battery (when flat) was coming from a transistor. There will be a circuit connected that switches when the main battery is low and then the bios battery can power the cmos. This little battery is only there to keep the settings when the main battery is changed. It is not there to hold the cmos settings in normal use over a long period. It can supply power to the cmos for maybe a few hours at most, but in normal operation the bios battery is disconnected from the circuit by a transistor or something similar and is not used at all.
Nice! 😎
Hi Sorin I saw that some colleagues on UA-cam have voice translation in all languages(italian please), you can activate it too in the following videos. Thanks
I hope before closing up that laptop that you tightened down the USB port cable whose connector you unlocked at 1:49 . Personally I replace laptop batteries that are 3 volts or less with new batteries. They are cheap enough on eBay and there is less chance of the laptop coming back and biting you in the rear.
I tried to weld a new battery with spotwelder it blowup on face!😅trust me do it like sorin done it!
I think in general I would not say charging a battery with any voltage is ok. You need to understand batteries, than it is safe to do, but even that case I rather limit the voltage. Li-ion cells over voltage is dangerous. When you try to charge a fully charged battery with high voltage and 3 amps, you can overvoltage the cells. BMS will prevent it probably, but if there is a minimal chance of an accident I rather not advise to do it.
Didnt know you could charge a non-rechargable CR2032
Yes. All "non-rechargeable" batteries (power cell) are rechargeable. They just don't want you to know it. But the amount of power required to charge them is not very efficient, such that if you want a rechargeable battery, it's better for the amount of electricity it takes to recharge them, to use rechargeable batteries. Also once those batteries get old and weak, they won't hold much of a charge anyway. Also recharging "non-rechargeable" batteries requires a much more attention to battery temperature.
i was having the same problem on Dell Desktop and the problem was Bios Battery
Thanksssss
I think you are a bit wrong about the bios battery, it is used pretty much all the time, but the current is so small that they typically lasts for 10 years, usually longer than a normal lifetime of a computer. Perhaps there is another fault using too much current from the bios battery?
No, there is a circuit that disconnects the bios battery and it is not used except when the main battery is low or missing. It is there only to save cmos settings when changing out the main battery. This problem happened because the main battery was low and not charging due to a EC chip glitch.
that tin box has everything
It used to be battery is first thing you remove, and it would start with just power cord.
CR2032 batteries must be very expensive in the UK. I wouldn’t even consider any extra work when a battery costs just tens of pennies.
Buy instead of fix? You obviously lost your hair cause you're not a boss like Sorin.
U can't fix, the cr2032 are not rechargable... The Little recharge Sorin put to It will lose in few minute..
Just fixed an LG gram with same issue. No bios battery even, battery discharges too much, laptop gets stuck.
Lucky customer! Got a brand new proper calibrated battery! 😂
Why does nobody clean their fans?
Out of site out of mind!
Stop writing this Word without any sence...do a normal and costructive comment or leave at all
My wife caught me another day says that are sexy motherboard😂😂😂😂😅
"What are you doing watching mother porn???" lol 😂. I quite like a sexy cougar, myself 😍
2.9v is not great 😊
the easiest pizza I have ever seen 😂
GOOD VEDIIO SIRR👍
Some laptops from years ago (I have an old Mitac 8170 Pentium 4 here in my workbench) used to use RECHARGEABLE batteries for the BIOS, and they'd charge when the mains was connected. Ahhh, they don't make them like they used to! Today's laptops are flimsy crap!
you can unwrap the original battery and put another one
Come on now the bios battery was made out of chinesium.....😊
🎉🎉🎉🎉🎉🎉🎉
12:25 never seen 40£ cmos battery replacement this dodgy XDDDDDDD
i mean different: connector size & battery size & low voltage & drowning in un-recyclable hot glue
that is some real conversation starter
Hot glue comes off with IPA.
That's normal for this channel. Don't like it... don't watch ;-)
👋
Thanks for showing what happens when Lenovo saves 20c by using cheap, no-name bios batteries. LOL!
Done by design... I got an 8th gen laptop thats been running without a battery for 3 years.
Thank YOU SIR
And you know Raycon earbuds are making a sale on their earbuds OBVIOUSLY for the holidays and till new year's eve so why don't you contact the company and tell them to sponsor you Mr SORIN?! AND I CAN GUARANTEE YOU THAT THEY'RE ONE OF THE GREATEST AFFORDABLE EARPHONES, I WOULD NEVER TELL YOU THAT IF THEY WERE CHEAP AND NOT A GOOD PRODUCT OF COURSE NOT
And thank you again and Merry Christmas Mr SORIN 😊
sorin my friend. Is this video a joke or what? 🤣🤣
😁😁😁😁
size doesn't matter lol
new laptops design are crap and garbage!
Nice small sexy motherboard 🤣😂🤣🤣🤣🤣🤣😂🤩💪💪👍👍
Enjoy your pizza 😂
Sorin a aparut un nou reparator in laptop este ordonat ca un neamt si eficent Robert Majowski
More and more 🍕
easy pizza
Living in the UK should be so easy ordering a new Lenovo bios battery from ebay. I'm pretty sure a brand new one would be next to nothing.
What an idiotic design. I will never buy this laptop. EVER!
Please charge the battery without replacing next time for entertaining purposes 😈 being dodgy saving money
Bad repair, how can customer change bios battery on next time 😓
It's an easy fix, customer can just buy a correct replacement bios battery with the correct connector and change it.
Lenovo is the worst laptop manufacturer.... i bought a lenovo laptop and the screen backlight is gone just because i disconnected the screen once and connected it again...
Never buy Lenovo!
When disconnecting the screen connector you must FIRST remove the battery. If not the backlight fuse will blow or some other part of the screen electronics will be damaged. Everyone knows that...... except you lol