Tablets, e-readers, and even notebooks are more efficient than the power-sucking smartphone in your pocket. While battery technology ... bench testing a new power amplifier chip that consumes ...

The latest Katana amp puts the features of its big brothers into a compact, battery-powered combo that goes where you go ...

There doesn't seem to be any magical, industry-redefining magic at play here: It's just a battery-powered wall outlet ... on the subway using an 85-watt amp? ChargeAll! Want to watch the football ...

It’s also well equipped to serve in an emergency. The ChargeTech Portable Power Outlet AM is a mix between a portable battery pack, albeit a big one, and one of the more robust and capable power ...

There are a small handful of old tubes that need an impressively low voltage to work, though, and [J.G.] has put a few of them to work in this battery-powered audio tube amplifier. The key to the ...

Here’s how it works. THX has showcased a working prototype of its latest audio development: high-performance yet compact and battery-powered amplifier technology that claims to deliver "sound quality ...

The Spark Mini tips the scales at just 3.3 lb, and is battery powered for play anywhere portable ease The 5.76 x 4.84 x 6.49-in (146.5 x 123 x 165-mm), 3.3-lb (1.5-kg) portable smart amp comes ...