Does it bother you that on Twizy brake light not turning on when you release the gas pedal and braking with motor? If nothing else it’s dangerous because of a colision from a car behind you. I’m testing this device. It is made primarily for motorcycles, but it also works on Twizy. It has two modes of operation when you brake with motor. Steady brake light and flashing brake light. I realy like the flashing option. So there’s difference on the brake light between motor and pedal braking.
You can also try with promo code LIFETIME20 for 20% discount and lifetime warranty. Not sure if this code still works (pre-season 2019 discount)