This mod adds a version of the roboport building that extends the range of the construction and logistic networks, just like the normal roboport, but has no inventory. Roboport extenders still need power and bots can't stow themselves or repair kits in them but they will be able to charge, enabling most of the benefits of longer range while centralising your storage.
You can optionally customise the energy settings, ranges and inventory sizes of vanilla roboports too. The range extender will mirror all values besides storage.