If you notice a problem with the brakes on your e-bike you should stop riding immediately. If your brakes feel spongy or like they are not providing enough stopping power, then they will need tuning.
Another common issue may be that your brakes are rubbing, you will likely hear this and feel some additional resistance when riding. This may be due to a build up of dirt on your e-bike, or stuck debris, in this case we would suggest giving your bike a clean with some water and mild detergent.
If you're having persistent brake issues, or your brakes are not working, please let us know here.