Apps for dating emergencies and blood-pressure regulation mean nothing without a proper charge. For $17, keep your electronic amigo fully juiced with a 3GPower2 portable charger for your iPhone, iPod Touch, standard iPod, and iPod Nano, a $30 value ($2 shipping is not included with your Groupon). The easy-to-use charger completely refreshes your device in four hours or less.

Living life while fearing a dearth of electrical outlets greatly limits your enjoyment of roller coasters, sailboats, and cross-country jaunts via tandem bicycles. With this side deal, just connect the charger to the standard USB cable that came with your device, wait four hours, and you're good to go—on the go. The charger works with any standard dock-connecting cable and can hold a charge for up to six months. You can also use your device during the battery-boosting process. The transportable lifesaver is easily stashed in any bag, back pocket, or coffee-cup hand warmer.