eufy robo vac 11 dead, not working, red light with 4 beeps while charging, unexpectedly stopping fix

eufy robo vac any model having below issues can be fixed by method showing on video/bypassing battery circuit/jumpering battery circuit,
4 beeps and red flashing light-not working
4 beeps and red stable light - while charging - in between charging - device works
no beeps no errors works as normal- soon battery low indication appears
no beeps no errors works normal but stop suddenly nowhere or while applying load - no power no led no beeps - to work again switch should be off and on again or keep in charging base manually.
for above mentioned all problems the culprit is battery pack, some times battery itself or battery charge controlling circuit, so first check the battery even if u full charged battery and still showing any of errors above then bypass battery charge control/protection circuit inside battery pack , but do that only by your own risk, that circuit there is for a reason for your and device safety.

[@elainelily9910]

I have a eufy 11. Replaced the battery 2 yrs ago but the red light goes on AFTER it is all charged up so I back it off from the charger. Works fine. BUT now it is acting up again, makes a clicking sound, so I got ANOTHER new battery, a 3000 instead of a 2600, replaced the brushes, and now it works like new.

[@HeadmasterAlbusDumbledore]

hey man , i got eufy robovac 10 hybrid but the problem is when i start taking readings form the battery plug coming from device ( 2:56 ) the voltage goes from 12/13 v to 5/3 v is it normal for device to charge the battery like this .
Help is aappreciated

[@basicthoughts8054]

Its just may be faulty bcm module, or out of 4, 1 battery may be bad, to confirm check each battery one by one all voltages must be same if can check amp check that also. You can bypass bcm module but at your own risk.also with bcm its safe to charge at any voltage as the bcm will automatically balance voltage and charge batteries, bcm is the green circuit (battery controller module). Or called as bms (battery management system)

[@HeadmasterAlbusDumbledore]

I just did all readings of cells ,
First cell 4.03v
Second cell 4.01v
Third cell -0.44v
Fourth cell 4.03v
Now the problem is I have spare cell but cell's rating is 3.7 v and 2200 mah so should I replace third cell with this one or buy new battery pack for device

[@basicthoughts8054]

@@HeadmasterAlbusDumbledore hopefully u can replace and try first.

[@HeadmasterAlbusDumbledore]

Well today I replace the damage cell now the today voltage output is 16.09v is it ok to connect this battery to device cause the label on the battery say the output is 14.4 volts

[@basicthoughts8054]

@@HeadmasterAlbusDumbledore yes assuming its a 4 cell 3.7v battery

[@UAE410]

i have the same problem..replaced with new original battery from eufy and still not charging .. any tips or possible causes?

[@basicthoughts8054]

Is it showing charging indicator? Battery need to boost charge if completely flat(out of charge) is your device powering up? Tried with wired charger and charging dock?

[@UAE410]

@@basicthoughts8054 my device had dead battery for while..bought new battery and install it..whenever i but on base for charging its showing red light and giving me S1 error ..i have eufy g10 robovac

[@basicthoughts8054]

Its a battery issue itself chcek the output voltage of battery may be zero or below normal voltage u need to charge/boost battery with external voltage not exceeding total capacity of battery pack voltage
Power off the RoboVac.
Remove the battery cover and inspect whether the battery is connected properly. Disconnect and reconnect the battery if needed.
If the surface of the battery feels warm, please wait until the battery cools down.
Install the battery cover after reconnecting the battery.
Power on and start the RoboVac to verify it is able to successfully navigate and complete a cleaning cycle without issues.
If u buy battery from local shop nearby ask them for a charged battery or ask them to boost it even nearby mobile shop can help u boosting the battery to a threshold where it will automatically detect by unit

[@UAE410]

@@basicthoughts8054 i will chick about battery boost and hope it will work..new battery and i have the same problem before i replace it.. hope ill find away to know where is the exact problem before wasting more money

[@basicthoughts8054]

Bro just boost your battery , battery protection circuit will shut output voltage when running on very low voltage to protect battery over discharging n that is your issue to confirm s1 error remove battery amd connect the unit to the base/dock u may c the same s1 error thus u can can confirm the battery is the real issue.. battery boosting is free of cost.