Flight delays, power outages, longer-than-expected trips. You can't always recharge your Blackberry device when you'd like to. But with an extra Blackberry battery on hand, you can always talk, type, and work as long as you need to. Keep it in your bag or briefcase and stay connected, powered up, and ready to get the job done. Blackberry batteries are designed to work optimally with your device, ensuring it is powered for longer and the battery sustains an optimal amount of charges. The Blackberry D-X1 Battery features integrated security that ensures you're using a battery specially designed to work with your Blackberry device. Your device will be powered longer and the battery will sustain a greater amount of charges with a Blackberry battery, the only one that works with Blackberry devices.