How the technology works, what a specification actually measures, and which machine fits which garden, written from the same published figures the rankings are scored on.
How to measure a lawn, what a maker's rated area means, how much margin to leave, and which robot mowers we list suit a small, a medium or a large garden.
Lift the mop, leave it at the dock or steer round the rug: what each robot vacuum we list does at a carpet edge, and what the makers' millimetres measure.
Which window robots fit your glass, how they hold on when the power fails, what the rope and the backup battery are for, and which ranking to open next.
Makers cross out prices all year, so a Black Friday tag needs a reference: nine days of our price log, the EU's thirty-day rule and the models to watch.
When to stop, how to store the battery, what to do with the dock and RTK antenna, and what to check in spring, according to Segway Navimow and Mammotion.
Robot vacuum obstacle avoidance from the makers' own figures: bumper, structured light, cameras and depth sensors, and which machines we list have which.
A slope rating is a percentage, not degrees. What 45%, 55% and 80% look like in a garden, why driven wheels decide, and which mowers are rated for what.