You don’t have to supersize your television to get the best features and picture quality—just follow our recommendations for the best 40-inch TVs.

The Samsung Q60A features plenty of high-end features and a fantastic 4K QLED panel.

It used to be hard to dump enough electricity through two pieces of metal to meld them together. But a lithium-ion battery can do it. The question is, should it? [The Signal Path] takes a cheap battery-based spot welder apart to see what’s inside and tries to answer that question. You can s

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