The A2 wheel is a generic X3 clone. The wheeler had a power cut because of a defective cell. After the shunt, no more power shutdown, even if the defective cell has not yet been replaced. All that happens then is a much less powerfull wheel because the defective cell (to be replaced) behaves like a short, leaving a battery pack with lower voltage, though a much more preferable and manageable situation than a sudden cutoff. More evidence of the criminally stupid idea of integrating a cutoff circuitry in an electric unicycle.
P.S. The wheel electronics is accessed from outside, which is a good point ! Mainboard is a X3 generic, with the same ridiculous heat sink which doesn’t sink anything and needs to be added a big aluminium plate.
Shunt by connecting B- to P- :

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