Take a look inside Alibaba's smart warehouse where robots do 70% of the work. They can carry up to 500 kilograms above them around the warehouse floor.
They have special sensors to avoid colliding into each other and they can be summoned using wifi. When they run out of battery, they can take themselves to a charging station. A five minute charge can power them for 4/5 hours.
(Source: Business Insider UK YouTube channel)