There is no better way to master robotics than building and programming your own robots. The EAIBOT D1 is an educational robot with SLAM, Raspberry Pi 3 controller, and ROS. It also comes with a 14000mAh battery that lasts up to 8 hours.
This robot is compatible with Linux, Android, and Windows. The Dashgo robot is ready for obstacle avoidance, mapping, and other research areas.