My vacuum died again and now i had 2 dead batterys laying around. Saw this and figured i might combine all good cells to make 1 good battery out of 2 dead ones. Was my first real soldering job i ever did but i did it and my vacuum works again. Thank you!
*A great vacuum for the price. The suction is awesome. Excellent for pet hair. The beater attachment works great **MyBest.Tools** on the stairs. Not too heavy and easily maneuvered.*
Thanks, worked like a charm! My battery pack also had 2 dead batteries. Voltage of the pack was bellow 10v and the robot just died everytime it left the dock. :)
The navigation system is great🌼 with the fact that it does the mapping of the house and knows where it passes does not leave any corners unclean and also saves a lot of time because it does not have to go over several times on the same points.
Yesterday I noticed mine died too. I was about to buy a new battery when I saw your video, gave it a try and it worked :D Thanks man! Except mine had a ton of glue inside so I had to chop the enclosure to pieces to get it out.
I'm happy that you find my video useful, later i found that it can happen only one cell of every two connected in parallel can be defective. If you find that battery capacity is not sufficient and vacuum shuts off during operation until battery is drained to lower capacities - in mobile app - this is indicator of only one defective cell.
@@chichovenci I measured that both were dead, luckily had many spares from dead laptop batteries. How I noticed something's wrong in the first place was that the vacuum was moving ~2cm away from the dock after a moment of trying to charge. Must be a clever safety feature.
Viomi Alpha UV(S9) remove all the main screws, on back of the robot vacuum, and then lift the lid from the front to access the battery, as per Xiaomi. Thank you.
Hello, thanks for such a useful tutorial. May i ask, if we replace all 8 batteries to LGABB41865, what will the capacity be? Since each LGABB41865 is 2600mAh, will it be a whopping 20800mAh and can the roborock last perhaps multiple times longer than the original xiaomi battery? Thanks for answering
Hello and thank You for Your work! Is there any chance that You can share a macro picture of the battery board, especialy the B2 compartment. I just put out some resistors with my screwdriver when opening the case and now I need to solder them :D
Hello, thank you for the great video ! First my experience: the robot arrived 1 Sept 2018 and works every single day. Average runtime 1 hour, 50-55 square meters a day, total run 757 hours 38k square meters 867 cleanups. It sits on the charger all the time when not cleaning. I didn t find this video before, so I already got the replacement battery pack a few days ago. It wasn t really necessary, just noticed that on turbo mode the robot cannot do the job at one attempt, but returns to the charger before finishing. Now I want to ask your help. I cannot open the old pack without ruining it, but it has 16.4V btw red and black wires. I want to pu it in my EV as an emergency startup battery. When the 12V small battery is discharged, the car needs something to kick on the traction system, that then will take over and charge the small battery. I successfully used for this purpose a 20V 5S commercial screwdriver battery pack and think that this double capacity 16,4V battery will do the job too. But I want to keep it charged ouside of the vacuum, soI need to know what is the method of doing this - what voltage to connect to which contacts of the four pin plug. Would you be so kind to advise the simplest method of keeping it charged ? Thanks a lot!
In my opinion if this is original battery first check if there is bad cell i had the same experience cleans but dies somewhere in apartment on random place... after further inspection happened that one of parallel cells was dead. when this happen you can expect faster wear of other cell... to charge it you can use B6 charger from aliexpress and laptop charger (16v) (have you tried the easiest to connect black and red wire to 16v power supply)
thank you very much for the detailed video. :-) unfortunately, in my BRR-2P4S-5200S / GB 31241-2014 they filled the BOTTOM of the orange enclosure with glue, so there's no way of getting the batteries out without breaking the orange enclosure. :-(
Hello, I have a question. My robot starts cleaning with 100% of battery left and the last 4-5 times when it arrives to 40% it dies suddently. Before when the battery percentage was low it returned to the dock in order to recharge itself and after that it starts again, but now it stops itself in the middle of the room without any voice message. Do you think that could be the battery pack that is damaged and it is necessary to replace it?
Buenas tardes! Alguien sabe porque puede ser que mi vacuum comenzó a funcionar lenta de un día al otro. La limpié toda, pero sigue lenta, hace unos días atrás iba mucho más rápido haciendo su limpieza, que podrá ser? Hace 10 meses que la tengo
hello, first of all, thank you very much for this informative video. I applied exactly what you said, I just changed two cells, but I can't get output from the battery, I changed the fuse from the old laptop batteries, but there is no voltage to the black and red ends of the cable. Where could the problem be? ?
I am trying to make a battery from ground zero, I bought a 4S BMS PCB, and 8 cells. Could you please tell me the pinout of that battery cable going into the vacuum? I assume, black is GND, red is VCC. What are yellow and white?
I hope that author of this video doesn't mind me chiming in. Yes two wires are positive and negative, then we have balance wire and temperature wire. Hope this helps.
@@chichovenci I have solved the problem. Before installing the renewed pack, I have tried to charge it by connecting it to my charger. Female connectors has expanded while doing this and when I connect it to robot socket, it didn't sense the battery. I changed the connector and now it is working.
Hı, i changed 2 dead batteries, voltage seems ok when i check it with multimeter. But the problem, although ı replace the battery pack, mi robot does not work. Can bms damaged?
Except, faulty battery this fault can arrive if there is a issue with charging circuit on the mainboard. It can be caused of faulty charging controller or some elements in charging circuit.
hi, I want to ask a question about battery performance and life in general. I am using s5max. When will the battery lifetime start to decrease if we use it at least once a day and everyday in a week ?
Battery life is excellent (if cells in pack are "ok") I have friend with same vacuum and after about 3 years battery life is enough for 100 square meters apartment.
@@chichovenci i use roborock s5max. I always run the robot with the same options under the same conditions. and I note the cleaning time, square meter and charge expense percentage in excel after each work. The data has not changed much since the day I bought it. this is good, it means stability. So is this really the case for years? Battery performance and battery life are important to me :)
@BARAN BARIŞ Maybe is not the best example but it's pretty much like your phone. Batteries degrading with time and cycles, also cells "hate" low and hi temperatures.
Does your battery still work? There are reports in by other users in the internet, that the charging controller kills the batteries. A change of the batteries did just temporarily fix the problem for them.
Thanks for the video. I replaced all my cells with NCR18650B. Fully charged cells, I get 16.4V between testpoints T10 and TP2. However, at the connector, black and red cables measure 14.8V. All other testpoints to the battery leads measure 4.1v or 8.2v. Any ideas? The robot won’t power on with battery alone. When on the dock it powers on and says charging, no errors. The moment it gets off the dock losses power. I have a new battery which works fine with the robot, so I know it’s not a problem with the robot. Thanks in advance for any tips.
I'm almost sure that you have issue with the fuse, 12ah3 in my other video I had the same issue and replaced the fuse. After i replaced the fuse with another one battery become fully operational.
@@chichovenci thanks for the tip! I think you are right! One of the fuses seems to went off. I’ve not taken it out yet, but it should be a SC 12AH4, right? since it’s 4 cells in series. Thanks again for the useful video and tips.
смотри мое другое видео ... cells replacemen ... там я заменил все елементи из батарея и она работает до сейчас ( у батарея xiaomi там еест плат баланса елементь )
@@chichovenci 18650 cells are sold in 2 formats in every battery store: with or without protection circuit. Protected cells are always a couple mm. longer and that could be a problem in some devices.
Hey, video is uber cool! I have a 1st gen mi robot which keeps shutting off suddenly after it reaches 58% of battery. Check the output voltage on the batteries and it gives 16V when fully charged between the red cable terminal and other 3 lines, which makes me think its not the battery problem. I would be really grateful if anyone knows a solution as to why it is switching off suddenly?
@@idanvirt8823 nothing as of yet. Waiting on a battery from AliExpress to get delivered during these days of uncertainty. Will post here if I find a solution
@@basanthbalram me also! Im very surprised.. But week after my wife saw the s5 max robot on a good price and she bought it. So now im trying to sell the roborock 1st generation 😂
Xiaomi home app and manual says keep roborock on deck when is fully charged to extend battery life??? Is that true?? I know that this is not good for li-ion battery to be on 100% whole time?? Ty
I have replaced all the cells (the vacuum started stopping suddenly while cleaning at the maximum speed) but now the battery doesn't work anymore. The new cells are Samsung 18650 30Q, they had 3.70v when installed and the soldering points are good (all tested). Now the robot detaches itself from the charging station and shutdown. It doesn't turn on if not under charge. Any idea?
Charging board is not balanced. If there is diferent charge on every continues coupled batteries you will experience exactly this. Check the charge of batteries (voltage) after it turns off and after is charged if there (is a difference - you already find the issue) ... (you can use IMAX b6 to fully charge all 4 pairs of cells and after they are charged hopefully battery will work).
@@chichovenci Hi, each parallel of two newbatteries has about 3.72V (much less than the original batteries (that were about 4.00V). Is it possible that it is too low and they need an initial charge?
@@chichovenci so, I charged the parallels, but it still doesn't work. The vacuum cleaner detaches from the charging base. How many volt you measure at the red and black wires out of the battery pack? I get only 7.8V, not 16V. Is it normal?
Fantastic. However, We do not recommend DIY for wrapped battery packs, as the wrap is for heat installation, when charging. You can buy new battery packs, globally cheap from China for Xiaomi and Viomi brands. Thank you.
My vacuum died again and now i had 2 dead batterys laying around. Saw this and figured i might combine all good cells to make 1 good battery out of 2 dead ones.
Was my first real soldering job i ever did but i did it and my vacuum works again. Thank you!
*A great vacuum for the price. The suction is awesome. Excellent for pet hair. The beater attachment works great **MyBest.Tools** on the stairs. Not too heavy and easily maneuvered.*
Thanks, worked like a charm! My battery pack also had 2 dead batteries. Voltage of the pack was bellow 10v and the robot just died everytime it left the dock. :)
Good job! See the dance of a vacuum cleaner at the end. She is so happy now.
thx for posting this. i've always wondered what to do if my batteries can't hold its charge in probably 2 yrs time.
The navigation system is great🌼 with the fact that it does the mapping of the house and knows where it passes does not leave any corners unclean and also saves a lot of time because it does not have to go over several times on the same points.
Yesterday I noticed mine died too. I was about to buy a new battery when I saw your video, gave it a try and it worked :D Thanks man! Except mine had a ton of glue inside so I had to chop the enclosure to pieces to get it out.
I'm happy that you find my video useful, later i found that it can happen only one cell of every two connected in parallel can be defective. If you find that battery capacity is not sufficient and vacuum shuts off during operation until battery is drained to lower capacities - in mobile app - this is indicator of only one defective cell.
@@chichovenci I measured that both were dead, luckily had many spares from dead laptop batteries. How I noticed something's wrong in the first place was that the vacuum was moving ~2cm away from the dock after a moment of trying to charge. Must be a clever safety feature.
Viomi Alpha UV(S9) remove all the main screws, on back of the robot vacuum, and then lift the lid from the front to access the battery, as per Xiaomi.
Thank you.
I have a Niato robot vacuum cleaner. The battery protector of the vacuum cleaner does not work. What is the solution?
Hello, thanks for such a useful tutorial. May i ask, if we replace all 8 batteries to LGABB41865, what will the capacity be? Since each LGABB41865 is 2600mAh, will it be a whopping 20800mAh and can the roborock last perhaps multiple times longer than the original xiaomi battery? Thanks for answering
Original Xiaomi capacity is 5200... battery is made from 8 cells ... two in parallel 2600mahx2 = 5200mah ...
Did u increase the capacity? Did it work?
Is it possible to put the batteries from a 1T or 1S into a 1C ?
Nice! She is dancing again :)))
Hello and thank You for Your work!
Is there any chance that You can share a macro picture of the battery board, especialy the B2 compartment. I just put out some resistors with my screwdriver when opening the case and now
I need to solder them :D
i'm not sure how helpful can be this photo ... here it is vencislavov.snimka.bg/details/xiaomi.5156827.39087113
Hello, thank you for the great video !
First my experience: the robot arrived 1 Sept 2018 and works every single day. Average runtime 1 hour, 50-55 square meters a day, total run 757 hours 38k square meters 867 cleanups. It sits on the charger all the time when not cleaning.
I didn t find this video before, so I already got the replacement battery pack a few days ago. It wasn t really necessary, just noticed that on turbo mode the robot cannot do the job at one attempt, but returns to the charger before finishing.
Now I want to ask your help. I cannot open the old pack without ruining it, but it has 16.4V btw red and black wires. I want to pu it in my EV as an emergency startup battery. When the 12V small battery is discharged, the car needs something to kick on the traction system, that then will take over and charge the small battery. I successfully used for this purpose a 20V 5S commercial screwdriver battery pack and think that this double capacity 16,4V battery will do the job too.
But I want to keep it charged ouside of the vacuum, soI need to know what is the method of doing this - what voltage to connect to which contacts of the four pin plug. Would you be so kind to advise the simplest method of keeping it charged ? Thanks a lot!
In my opinion if this is original battery first check if there is bad cell i had the same experience cleans but dies somewhere in apartment on random place... after further inspection happened that one of parallel cells was dead. when this happen you can expect faster wear of other cell...
to charge it you can use B6 charger from aliexpress and laptop charger (16v) (have you tried the easiest to connect black and red wire to 16v power supply)
@@chichovenci hii! Out of topic but do you know the use of other 2 wires? Is it for charging or thermistor?
thank you very much for the detailed video. :-)
unfortunately, in my BRR-2P4S-5200S / GB 31241-2014 they filled the BOTTOM of the orange enclosure with glue, so there's no way of getting the batteries out without breaking the orange enclosure. :-(
You can 3d print orange "enclosure" in my other video with vacuum battery in the description I placed link to 3d files.
why mine just doesn't come up.. it feels like it was glued inside
Hello, I have a question.
My robot starts cleaning with 100% of battery left and the last 4-5 times when it arrives to 40% it dies suddently.
Before when the battery percentage was low it returned to the dock in order to recharge itself and after that it starts again, but now it stops itself in the middle of the room without any voice message.
Do you think that could be the battery pack that is damaged and it is necessary to replace it?
Definitely the some of the cells.
What is the link to buy the entire battery?
Buenas tardes! Alguien sabe porque puede ser que mi vacuum comenzó a funcionar lenta de un día al otro. La limpié toda, pero sigue lenta, hace unos días atrás iba mucho más rápido haciendo su limpieza, que podrá ser? Hace 10 meses que la tengo
legend, thanks a bunch. now to pull my vac apart for the third time 👍
Damn, sealed up tighter than a fishes ring on the S5. THANK YOU CHINA
I'm thinking to make new battery from the scratch... now I'm waiting for bms from china and think to print case for new battery...
hello, first of all, thank you very much for this informative video. I applied exactly what you said, I just changed two cells, but I can't get output from the battery, I changed the fuse from the old laptop batteries, but there is no voltage to the black and red ends of the cable. Where could the problem be? ?
Hi . because BMS board on batteries do not allow to change cells and when you change one or more cell, it cut the output board.
Венци, батенце, ще ми подмениш ли клетките на батерията на моята прахосмукачка Xiaomi Dreame V9 срещу заплащане, моля?
I am trying to make a battery from ground zero, I bought a 4S BMS PCB, and 8 cells. Could you please tell me the pinout of that battery cable going into the vacuum? I assume, black is GND, red is VCC. What are yellow and white?
vcc, gnd, bsi, btemp
Thanks for the video. May I ask what are the 4 colored cables for? Two of them are for positive and negative I guess.
I hope that author of this video doesn't mind me chiming in.
Yes two wires are positive and negative, then we have balance wire and temperature wire.
Hope this helps.
@@igorskuratovsky1 I get the temperature wire, it should be an NTC, but what is the balance wire? Balance should be done internally by the BMS board?
in my case , dismantling did not work well. Seems that some units like mine are built with cells glued in the orange box, then ....
Mine too, i use grinding tool, so the outer case will be damaged.
@@ClawHammer00 how did it go eventually? How did you put it back without the original battery case?
Hi, greagt video. how many MAH Per cell?
Thanks
"New one" should be the same specs as the other cells in pack
I have faced with error 14 after changing all the batteries with the new ones. Is there any solution to this
According to Google Error 14: Problems with charging. The battery temperature is too high or too low. Wait until the battery temperature is normal.
Issue can be bms or temp sensor
@@chichovenci I have solved the problem. Before installing the renewed pack, I have tried to charge it by connecting it to my charger. Female connectors has expanded while doing this and when I connect it to robot socket, it didn't sense the battery. I changed the connector and now it is working.
If you happen to replace the rest of the batteries, this will be the first battery pack, officially approved by the LGBT community.
how do you remove the top cap of the battery case? yours was already open
with knife from the video
Is there any chance that LGABHG21865 or LGDBHG21865 can be installed instead ?
I've used Panasonic cells
Hı, i changed 2 dead batteries, voltage seems ok when i check it with multimeter. But the problem, although ı replace the battery pack, mi robot does not work. Can bms damaged?
Except, faulty battery this fault can arrive if there is a issue with charging circuit on the mainboard. It can be caused of faulty charging controller or some elements in charging circuit.
hi, I want to ask a question about battery performance and life in general. I am using s5max. When will the battery lifetime start to decrease if we use it at least once a day and everyday in a week ?
Battery life is excellent (if cells in pack are "ok") I have friend with same vacuum and after about 3 years battery life is enough for 100 square meters apartment.
@@chichovenci
i use roborock s5max. I always run the robot with the same options under the same conditions. and I note the cleaning time, square meter and charge expense percentage in excel after each work. The data has not changed much since the day I bought it. this is good, it means stability. So is this really the case for years? Battery performance and battery life are important to me :)
@BARAN BARIŞ
Maybe is not the best example but it's pretty much like your phone. Batteries degrading with time and cycles, also cells "hate" low and hi temperatures.
Doesn't solder heat damage the li-ion battery?
next time will use capacitive welding
Does your battery still work? There are reports in by other users in the internet, that the charging controller kills the batteries. A change of the batteries did just temporarily fix the problem for them.
If controller isn't damaged, battery elements will work fine ... my battery is operational
@@chichovenci what is battery elements?
Thanks for the video. I replaced all my cells with NCR18650B. Fully charged cells, I get 16.4V between testpoints T10 and TP2. However, at the connector, black and red cables measure 14.8V. All other testpoints to the battery leads measure 4.1v or 8.2v. Any ideas?
The robot won’t power on with battery alone. When on the dock it powers on and says charging, no errors. The moment it gets off the dock losses power. I have a new battery which works fine with the robot, so I know it’s not a problem with the robot. Thanks in advance for any tips.
I'm almost sure that you have issue with the fuse, 12ah3 in my other video I had the same issue and replaced the fuse. After i replaced the fuse with another one battery become fully operational.
@@chichovenci thanks for the tip! I think you are right! One of the fuses seems to went off. I’ve not taken it out yet, but it should be a SC 12AH4, right? since it’s 4 cells in series. Thanks again for the useful video and tips.
@@IoannisNousias I had the same problem I was able to solve the problem
@@IoannisNousias I did everything shown in the other video when I left the charger stops working at all
Você sabem onde fica (perto de que) esse fusível?
Это временный ремонт через полгода год элементы опять уйдут в разбаланс, тем более внутреннее сопротивления разные.
смотри мое другое видео ... cells replacemen ... там я заменил все елементи из батарея и она работает до сейчас ( у батарея xiaomi там еест плат баланса елементь )
Браво
Както обичам да казвам... "С две леви ръце правя чудеса"
Are those LG cells protected or is there an independent protection circuit for the whole battery?
All 18650 have CID and PTC protection... i'm not sure how is realized protection in BMS board.
@@chichovenci 18650 cells are sold in 2 formats in every battery store: with or without protection circuit. Protected cells are always a couple mm. longer and that could be a problem in some devices.
protected cells fits perfect in this case
where do i get replacement batteries?
I bought cells from local reseller. Easyest is ask Google for 18650 price... If you are not hurry you can try aliexpress.
Anyone has the battery diagram...
Hey, video is uber cool! I have a 1st gen mi robot which keeps shutting off suddenly after it reaches 58% of battery. Check the output voltage on the batteries and it gives 16V when fully charged between the red cable terminal and other 3 lines, which makes me think its not the battery problem. I would be really grateful if anyone knows a solution as to why it is switching off suddenly?
Check battery capacity
This is my problem too!
Did you find any solution?
@@idanvirt8823 nothing as of yet. Waiting on a battery from AliExpress to get delivered during these days of uncertainty. Will post here if I find a solution
@@idanvirt8823 got my battery from aliexpress and it's working again!
@@basanthbalram me also!
Im very surprised..
But week after my wife saw the s5 max robot on a good price and she bought it. So now im trying to sell the roborock 1st generation 😂
tks
Xiaomi home app and manual says keep roborock on deck when is fully charged to extend battery life??? Is that true?? I know that this is not good for li-ion battery to be on 100% whole time?? Ty
I keep mine on charging station.
No
8 batteries = 5200 mah?
batteries in parallel or series (ask google).
aferin sana
Hello. Where did you buy the batteries? Can you help me with the model of that battery?
Original cells used in this battery are:
LG... model is LGABB41865 you can find them in most electronic supply stores; internet magazines ... etc.
@@chichovenci thank you very much.
No need to reset the chipset?
No
I did the replacement cell with LG M26.
No output. Perhaps need to reset the BMS/PCB?
Yes!
I have replaced all the cells (the vacuum started stopping suddenly while cleaning at the maximum speed) but now the battery doesn't work anymore. The new cells are Samsung 18650 30Q, they had 3.70v when installed and the soldering points are good (all tested). Now the robot detaches itself from the charging station and shutdown. It doesn't turn on if not under charge. Any idea?
Charging board is not balanced. If there is diferent charge on every continues coupled batteries you will experience exactly this. Check the charge of batteries (voltage) after it turns off and after is charged if there (is a difference - you already find the issue) ... (you can use IMAX b6 to fully charge all 4 pairs of cells and after they are charged hopefully battery will work).
@@chichovenci Hi, each parallel of two newbatteries has about 3.72V (much less than the original batteries (that were about 4.00V). Is it possible that it is too low and they need an initial charge?
fully charged - 4.2v
@@chichovenci so, I charged the parallels, but it still doesn't work. The vacuum cleaner detaches from the charging base. How many volt you measure at the red and black wires out of the battery pack? I get only 7.8V, not 16V. Is it normal?
about 1 or 2v less than measured on battery terminals.
Fantastic. However, We do not recommend DIY for wrapped battery packs, as the wrap is for heat installation, when charging.
You can buy new battery packs, globally cheap from China for Xiaomi and Viomi brands.
Thank you.
Error 14 please
check battery voltage between black and red wire (also check contacts are they clear, check if connection is secure)
with that shitty weld that is a potential fire hazzard, burn down a whole house to save 50 bucks, lol