Specialized Warranty Expired - battery failure, what are my options?


cream

Member
Dec 6, 2021
53
72
Romania
That would be me :)

How long ago it manifested this symptom? Prior to that event, were there any concerning signs? (eg. capacity loss, interruptions when low state of charge). Does the TCU turn on or not?
 

petronP

New Member
Mar 19, 2025
4
0
Ukraine
Hello. I have bh atom x bike. Brose motor. I want to use specialized battery for it.
I have one but it is blocked.
This battery's have two boards. When I conect them - they don't start.
When I give 3.7 v to the border with mcu it start but show 0 percent.

The brose morot battery has 6 connectors.
Blu and green - flash
Black and red - power.
And do you know for what are yellow and brown?

20250317_165336.jpg 20250317_165549.jpg 20250317_165540.jpg 20250317_165400.jpg 20250317_165400.jpg
 

petronP

New Member
Mar 19, 2025
4
0
Ukraine
Also has anybody already seen this video.

In this video man has brose motor , display from my bike bh atom x and he made some kind of battery emulator.
With this bord you can use any battery with brose system.
In internet there are such words for Yamaha and bosh protocols
 

cimi74

Member
Jan 30, 2020
5
1
Zagreb, Croatia
That would be me :)

How long ago it manifested this symptom? Prior to that event, were there any concerning signs? (eg. capacity loss, interruptions when low state of charge). Does the TCU turn on or not?
The battery worked fine for 2 days after we bought it second hand... then on the third ride bike turned off after approx 6 km ... after being off for one hour .. it turned itself on again ... the capacity was as before. Now that repeats every ride.
 

cream

Member
Dec 6, 2021
53
72
Romania
Ok, so it works intermittently. And you got the 3rd led blinking when you try to charge it?

Also, how many cycles? You said you bought it second hand. Any signs of case opening? Did you wash your bike with high pressure water ?

The fact that it's still powers on is a good sign. But in order to know more, we need to have physical access to the battery. Let me know if you want to send it to our workshop for a complete diagnostic/repair.
 

petronP

New Member
Mar 19, 2025
4
0
Ukraine
I have this battery. It shows 1 green light without blinking
But it have 25v 3groups of cells have 0 v
Can I charge them from this points from foto 3

20250320_192231.jpg 20250320_192237.jpg 20250320_192249.jpg 20250320_192336.jpg
 

cream

Member
Dec 6, 2021
53
72
Romania
If the cells reach 0v, you can safely dispose them, do not try to charge them or it might end up messy :)

Assuming the other banks are good (balanced with max delta of 20-30mV), you can try to replace the 3 faulty banks with same cell type. But if the rest of the battery cells are used (lower capacity) their voltage will deviate from the new banks and BMS will give an error.

Also, even if you replace all the cells, you need to unlock the BMS in order to used it again.

I would say the only reliable solution is to replace all the cells.
 

yvrudnk

New Member
Mar 23, 2025
2
0
Ukraine
Specialized batteries CAN be repaired. Most M2 batteries with 3rd led blinking when charging have good cells inside and a locked BMS. Assuming the cells are good, I can unlock/repair the BMS so the battery can be used again.

There are parts of the circuit inside that work on very low currents so any moisture inside can prevent the BMS from functioning properly. The firmware will then prevent the battery from being used, setting a PF flag (permanent failure).

I've spent quite a while reverse engineering Specialized battery management systems present on M1 or M2 models.

Also, BMS can be completely separated from the battery in case you want a cell replacement. Then, it can be connected back. I can also reset battery metrics in this case (battery health, cycle count, design capacity).
Hello! Today I had a problem with my turbo levo. When I connect the charger, the third light (on the battery) starts blinking green. Please tell me how to solve this problem? I would contact you for repairs, but I am from Ukraine... I also have a good friend who assembles various electric bicycles like sur-ron, maybe he can help me, but he needs to understand what needs to be done. I am ready to pay for your help!
 

r00kee

New Member
Mar 28, 2025
2
0
US
If the cells reach 0v, you can safely dispose them, do not try to charge them or it might end up messy :)

Assuming the other banks are good (balanced with max delta of 20-30mV), you can try to replace the 3 faulty banks with same cell type. But if the rest of the battery cells are used (lower capacity) their voltage will deviate from the new banks and BMS will give an error.

Also, even if you replace all the cells, you need to unlock the BMS in order to used it again.

I would say the only reliable solution is to replace all the cells.
I have a 2017 Vado whose battery looks like PetronP's. After some rain, it doesn't seem to charge anymore and now I'm getting a single flashing LED on the far right. Is the BMS locked? What's necessary to unlock it?
 

cream

Member
Dec 6, 2021
53
72
Romania
I have a 2017 Vado whose battery looks like PetronP's. After some rain, it doesn't seem to charge anymore and now I'm getting a single flashing LED on the far right. Is the BMS locked? What's necessary to unlock it?
Most likely water damage on the PCB. Either charging circuit failure or firmware lock because of faults recorded. You said it's not charging, how about discharging? Does the bike still turn on?
 

r00kee

New Member
Mar 28, 2025
2
0
US
Most likely water damage on the PCB. Either charging circuit failure or firmware lock because of faults recorded. You said it's not charging, how about discharging? Does the bike still turn on?

Water would have most likely gotten into the contacts between the battery and the bike. The BLOKS computer just flashes part of the lowest portion of the battery icon and nothing else turns on. It's possible the BLOKS system is damaged too but I don't want to spend the money on upgrading to TCD-W unless I'm sure I can fix the battery because the cost of a battery is more than some new bikes.
When pressing the power button, I measure 3+V that's supposed to power the computer but no voltage on the 36V rail.
I don't see anything obviously wrong on the PCB. What I presume is a big fuse measures about 4ohms. I'll probably desolder that to see if it's the problem. What else would you recommend I check?
 

yvrudnk

New Member
Mar 23, 2025
2
0
Ukraine
Most likely water damage on the PCB. Either charging circuit failure or firmware lock because of faults recorded. You said it's not charging, how about discharging? Does the bike still turn on?
Hi! Can you please help me with my question? Do I need to reset the BMS?
 

cream

Member
Dec 6, 2021
53
72
Romania
Hi! Can you please help me with my question? Do I need to reset the BMS?
If the battery won’t output voltage on 36v rail when it’s turned on and the fuses/mosfets are ok cell have the same voltages on all bancs, ntc sensors ok, it might have a firmware lock. I can help, but I need physical access to the BMS board. If you’re in the EU, you can send the board and I will check/unlock it for you.
 

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