Black Friday buying guide

Our robot vacuum guide explains that laser, LiDAR or camera mapping lets a robot know where it has already cleaned, so it covers rooms faster and avoids obstacles. The Shark Matrix Plus maps the home room by room with AI Laser Navigation. The eufy Omni C28A uses iPath 2.0, which works in low light and under furniture. The Shark PowerDetect UV Reveal reads the floor, the edges and the dirt with eight PowerDetect technologies.

Robot vacuums

Our bean-to-cup vs pod guide puts it simply: bean-to-cup wins on flavour, freshness and cost per cup over time, and pods win on speed and ease. The De'Longhi La Specialista Arte has a conical burr grinder with 8 settings, and the Ninja Luxe Café Premier and Pro grind with 25 settings. The Ninja Prestige Dualbrew skips the grinder: ground coffee into a 1.8 L glass carafe, and capsules for espresso.

Coffee machines

Our TV buying guide sizes the screen from the sofa: measure the distance in inches and divide by 1.5, which gives 55 to 65 inches at a typical 2.5 m. For a soundbar, use the eARC HDMI port, which the Samsung U7000H, U8000H, M70H and QN70H each have on one input. For a console, the guide asks for HDMI 2.1 for 4K at 120 Hz: the LG OLED B6 has four HDMI 2.1 ports and a 120 Hz panel, while the Samsung models carry 4K at 60 Hz over HDMI.

TVs

Our air fryer guide says to match the litres to the household and to go dual-zone if you cook full meals, since two drawers cook two foods at different settings and finish together. Then measure the worktop: the side-by-side Ninja MAX Dual Zone is 41.5 cm wide. The Ninja CRISPi PRO's 5.7 L glass container feeds up to 6, and its 2.3 L container handles sides.

Air fryers