Flight delays, power outages, extended trips. You can't always recharge your BlackBerry device when you'd like to. But with an extended battery on hand, you can always talk, type and work as long as you need to. get one and you'll stay connected, powered up and ready to get the job done. This Blackberry FM1 / FM-1 battery Battery features a secure, cryptographic chip to ensure you're using a battery specially designed for your BlackBerry device.