Now playing: Watch this: Track fitness and well-being with Health 2:31 I complete workouts in an app called 7 Minute Workout, but I also log activities in Argus. My steps get counted with my FitBit, and my heart rate gets tracked in Instant Heart Rate. My data is everywhere — well it was — until …

Even if you’ve never owned an NFC-equipped phone or tablet (like the Samsung Galaxy S5 or a Nokia Lumia), you’ve probably used NFC. The technology, which lets two local devices share small bits of data, is embedded in things like commuter cards, print advertisements, and smart cards. Now that the technology is placed in more Android and Windows phones — …

James Martin/CNET Magnetic stripe cards are outdated, susceptible to fraud, and deserve an award for sticking around despite being older than the first computer. Plastic payment cards are finally changing with two things: Chip and PIN cards, and NFC-based mobile payments. Apple is the latest — and perhaps the most significant — player in the mobile payment space. If you …

Celebrities have the same security tools we do, so technically, we’re all equally vulnerable. Sharon Profis/CNET A number of celebrities were targeted this week in an attack that exposed nude photos — some said to be real, others fake — stored in Apple iCloud accounts. Here’s what we know and what it means about your own cloud security. How were …

If your Windows Phone’s battery drains before you can squeeze in a few lunchtime rounds of Super Sweet Crush, it may be time for a power check-up. Decreasing brightness and disabling Wi-Fi when it’s not in use are a couple obvious tips, but (like almost any piece of Windows software), there are other settings buried deep in your phone’s system …

Android gets a bad rap for short battery life, but that’s only if you stick with its default settings. Make these simple adjustments to give your phone or tablet a battery boost. Now playing: Watch this: Get better life on your Android device 2:58 Disable location reporting and history GPS is a huge battery hog, as it harnesses data from …

Now playing: Watch this: Extend battery life on iOS 7 2:34 Some of iOS 7’s new features might be hurting your battery life. Thing is, it’s not the standout features like AirDrop or the Notification Center — it’s the stealthy settings buried beneath a stack of menus. If you’re noticing a quickly draining battery, or just want to get more …

Now playing: Watch this: Amazon Silk browser tips 2:12 Before you ditch the Fire Phone’s default browser, Silk, for a popular alternative like Chrome or Firefox, take it for a spin. Built specifically for the Fire Phone, the browser boasts a few useful features you won’t find elsewhere. Browse the gallery to find out how to make the most of …

Now playing: Watch this: Exploring with tech outdoors 12:21 It’s time to start using your smartphone for more than just music during your workouts. But do a quick search for “fitness” in the app market, and the results are daunting. So, to get you started, CNET’s The Fix tested three of the most fun — and useful — workout apps …

Some say that printers are soon to be extinct. Others rant about their hate for the dead-tree format. But if you’re a student, a work-at-homer, or you just appreciate hard copies, the printer still holds a very important place in your home or office. Thing is, you might not necessarily be at your desktop computer when you realize the need …