Flight delays, power outages, longer-than-expected trips. You can't always recharge your BlackBerry Curve 8900, Thunder 9500, Storm 9530 Smartphone 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 briefcase or purse and stay connected, powered up, and ready to get the job done. BlackBerry BAT-17720-002 battery is designed to work optimally with your device, ensuring it is powered for longer and the battery sustains an optimal amount of charges. The BlackBerry 1550 mAh battery features a secure, cryptographic chip to ensure 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.