V-brakes have excellent braking power and control and would be
fairly easy and inexpensive to install on the EcoSmart scooter when compared to
disk brakes, To add front V-brakes to the Razor EcoSmart Metro electric scooter the first step would be to bring it into a bicycle repair shop and have them weld V-brake bosses onto the front forks. Then the front forks would need to be repainted and a V-brake, brake cable, and brake lever with built-in brake switch installed. The EcoSmart scooter's controller has an extra connector for a second brake switch that the new front brake lever switch could be plugged into to complete the installation.
Although caliper brakes would only require one hole to be drilled into the front forks to install, which almost everyone has the tools to do themselves, they have extremely poor braking power so I would not use them on an electric scooter. Caliper brakes barely have enough braking power to stop a small children's bicycle and they are just about useless for stopping electric scooters. I am speaking from experience here because I installed a caliper brake onto the first electric scooter that I custom built and it took forever to stop, even with both shoes dragging on the road trying to help.