The Robocharger is a 2x2 entity that offers a charging post for robots by fashioning a tesla coil on top of an electric pole.

The Robocharger connects to other roboports if it is within their logistics area. It does not have a logistics area or construction area itself and can not hold robots or repair packs. However, it offers 10 charge ports for robots to use in passing.

Thanks to TheLastEagle for providing Russian language support.
Thanks to GitGerby on Github for bumping version for 1.1 support

UPDATE 1.3.0 - FACTORIO 1.0.0 SUPPORT

Again, no functionality changes. Just supporting a new Factorio version.

UPDATE 1.2.0 - FACTORIO 0.17 SUPPORT

No functionality updates. Just support for Factorio 0.17

UPDATE 1.1.0 - ADDED RESEARCH

Robocharger is no longer enabled by default. It now requires research (120 red & green science) before being unlocked. Prerequisite for research is Construction Robotics, which is what unlocks the vanilla Roboport. Construction Robotics costs 100 red & green science.