The B3 Compact charger is a very simple to use charger for 7.4 2S and 11.1 3S battery packs. No need for additional power supplies or 12v batteries as this little unit has its own built in power supply that can be powered with 100-240v.
This is a programmable autonomous robot prebuilt kit that can be controlled via USB gamepad. The MarvelMind IPS (Indoor Positioning System) provides indoor navigation. ODROID-XU4 single-board PC provides the most flexible platform possible.