Though not yet recognized by mental health professionals, cell phone battery death anxiety is one of the leading causes of technology-induced stress. Thereâ€™s nothing quite as unfortunate as a waning battery life when youâ€™re only halfway through your day. Thatâ€™s why we offer all the best options to help you keep your phone fully charged for hours on end. Browse our selection of Nokia batteries, including a Nokia Lumia 521 battery option that you can carry in your pocket or stash in your office desk or gym locker. Other options for a Nokia Lumia 521 extended battery include innovative technologies that come with several charging tips that adjust to varying manufacturers, like your Lumia 521 battery and other popular phones. Features like retractable cables for car chargers and devices that also come with Micro SD card readers simplify your technological needs into one unique device, allowing you to downsize and simplify charging. Your Lumia 521 extended battery ships free to the U.S. and Canada to help meet your budget.