If you're away from an electrical outlet for long periods of time, there's no better investment than an extra battery. This is the official 1000mAh BlackBerry 8700g Standard Battery.
your device powered through blackouts, in an emergency,
or during long flights and trips with the miniSync
Battery Adapter. Using four AA batteries,
the miniSync Battery Adapter provides up to 5 charging
cycles for your BlackBerry. Requires the miniSync
Retractable Sync Cable.