Technologically astute teenagers expect the highest level of performance in every realm of gadgetry.From phones to cameras, computers and controllers, these devices are perfect for teens to use for school and personal projects — they’re functional, fast and fashionable.High voltageNew Trent’s PowerPak is perfect for techy teens who are quick to blow through their devices’ battery life. The compact charger can easily fit in backpacks or purses for quick, on-the-go charging of USB-connected devices. $69.95, www.newtrent.com. Calculated colorTexas Instruments calculators just got cooler — with color. The TI-84 Plus C Silver Edition Graphing Calculator now comes with multiple shades of cover options, including blue, pink, purple and green. $150, Target, Best Buy, Wal-Mart, Staples, OfficeMax.Ears onlyThe lightweight DJ Slims headphones from Outdoor Tech come completely sans wires — perfect for the teens looking to unplug and untangle. A built-in microphone allows for hands-free phone calls. $69.95, www.outdoortechnology.com.Ready, set, action!Samsung’s waterproof, shock-proof digital video camera is ideal for creating and sharing memories. The W300 Rugged Full HD camcorder is easy to use and ultra portable. $159.99, Best Buy, Target.Got game?Teens will jump at the chance to turn their smartphone into a full-on gaming device with the Kickstarter-funded iMpulse Controller. The keychain-size device acts as a wireless remote control, with the ability to command music, videos and games from near and far. The controller even acts as a locator for lost phones. $25-$37, available for pre-order at www.impulsecontroller.com.Watch this The Sony SmartWatch 2 allows you to manage Android phone calls, read emails, map runs, control playlists and take photos, all on your wrist. You’ll barely need to touch your phone again. Available in September.A little focusCapture every moment, from lunch-line antics to prom, with the camera on the Nokia Lumia 1020 smartphone. The new phone incorporates a sophisticated camera that allows for adjusting focus, white balance and exposure, resulting in high-resolution print- and Instagram-worthy photos. $659.99 with no contract, AT&T.