I use an *official* Raspberry Pi power supply to power both my Raspberry Pi 3 and the official Raspberry Pi 7 inch LCD screen. Never get low voltage warnings with this power supply. After adding this switch, I get low voltage warnings (amber flash on display) during boot and shutdown, and safely guess any higher CPU load. The product description says it causes "the smallest voltage drop, blah blah". " isn't true. This obviously causes a noticeable voltage drop, which has an obvious effect. Perhaps this product is "good" if you're using the official power adapter to power *only* the Raspberri Pi and no additional accessories at all Not sure how to supply power as that's not how I use my Raspberry Pi, the switch itself is fine, the connectors seem fine, the clicks are fine.