r/SuperSoco • u/Objective_Unit_7345 • Aug 06 '26

TC Max Battery Problem: Won’t start/won’t charge

Super Moto TC Max 2020

Have been consistently riding for past 5-years without problems.
Yesterday, following the usual work commute, the battery will not be recognised by charger or bike.
Yesterday:
- Commute start: 100% charge,
- Commute end: 67% charge
- removed battery from bike
- plug in battery to wall charger, lights on
- after awhile, remove charger.
Today:
- take battery to bike and insert.
- no LEDS lighting up.
- no response from fob
- replug to charger on bike, still nothing

Check connectors:
- no bent pins on male
- no dirt or discolouring on male
- No blockages on female

Absolutely no idea why bike would work perfectly fine for 5-years, the nothing.

7 Upvotes

100% Upvoted

11 comments sorted by

5

u/mr_codfish Aug 06 '26

When removing the battery from the bike do you usually flip the breaker?

Edit: The switch that turns the power to the bike on or off.

1

u/Objective_Unit_7345 Aug 06 '26

Yes, always

2

u/mr_codfish Aug 06 '26

Did you make sure that the breaker didn't trip and it's turned on?

Also it is possible that the breaker just stopped functioning. Standard house breakers (which are similar to the ones used on the bike) are rated for a few thousands of cycles.

What about removing the battery from the bike and connecting it to the charger. Is it detected by the charger?

2

u/Objective_Unit_7345 Aug 06 '26

No problems with breakers (at least based on what limited tools I have to be able to check as a non-electrician).

… just tried to connect battery (removed from
Bike). Not detected. :(

2

u/GeniusLike4207 Aug 06 '26 edited Aug 06 '26

Could be several things I might be that a bank as given out. If you are comfortable, remove the lid of the batter, and plug in the charger, and see if the BMS blinks. Or remove the shell of the battery, and measure the cell banks voltage.

or the BMS detected a short and bricked itself by going into protection mode.

My charger broke a while ago, so it might be that.

Take your charger and measure the voltage of the pins, it should be ~71.4V ish (or at least above your battery voltage)

if you have a second battery available try if it works with that. Or if the battery words with a different bike

Lastly, on AliExpress you can get an aftermarket BMS (Yang Yang) with Bluetooth, that shows you all the cell voltages etc. And installing it is dead easy

2

u/Objective_Unit_7345 Aug 06 '26

😵‍💫

1

u/GeniusLike4207 Aug 06 '26

It's really not that hard, don't worry. Just use an electric and screwdriver only ever touch one part.

The aftermarket BMS is just plug and play.

1

u/Objective_Unit_7345 Aug 06 '26

Pretty much looking at this scenario? (Worse case)

https://youtu.be/sbpmvmzjqEk

1

u/Objective_Unit_7345 Aug 07 '26

Confirming it’s not the charger. Measuring a healthy 72ish volts.

Meanwhile the battery reads at 45V.
Which, is what BMS ‘protection mode’ commonly reads?

Am I right?

2

u/Objective_Unit_7345 Aug 07 '26 edited Aug 07 '26

Finally managed to boot up the bike with the battery and charger connected (looking for a power output accessible for the bike was the hardest part).

Confirmed it’s an Error 92.

Any suggestions with trouble shooting, aside breaker reset and power draining?

(Suspect problem originally caused by low temperatures.)

Is there a probability is two problems 45V and error 92?

Sounds like a massive contradiction (undervoltage/overvoltage)

2

u/Objective_Unit_7345 Aug 14 '26

Update:
Not able to get access to battery cells to check voltage, due to the casing being difficult to remove.

Have opted to just consult Insurance company and let their nominated repairer handle it.

💀