[Robert Nixdorf] frequently needs to use this high-end audio recorder, but it sucks dry a set of eight AA batteries in just a few hours. Obviously a longer lasting solution was required, and he ...

There are very few things as annoying as your phone battery draining in the middle of a drive, especially when you need it to find your way around. You reach across for your power bank, only to ...

This is a follow-up to this thread: https://arstechnica.com/civis/threa...-polarity-of-this-laptop-barrel-jack.1491071/tl;dr I have a laptop but no charger, and I'm ...

SCRs are the switching devices for this unusual DC to DC converter that is suited for the ubiquitous 5V USB power source as well as numerous other applications. This novel power circuit topology uses ...

This is a 5V to 12V DC-DC step-up (boost) converter circuitry that is especially ideal for the USB powered applications. First of all a USB port has two current supply modes. Before detecting the ...

Do automotive electronics qualify as "mobile computing?" Presently I mount my iPhone to the left corner of my windshield and my Jabra Cruiser BlueTooth/FM speakerphone on my visor. The charging cables ...

Every day, countless family arguments arise on the subject of who gets to charge their device on the move. Sometimes a car just doesn’t have enough power sockets to go round, and that’s why ...

We haven’t seen much of the Model Y interior, and have assumed it would mostly look like the Model 3, just a bit bigger. But we have seen that the third-row seats aren’t very large, at least in ...