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 1800mAh Palm Treo 700p 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 Pocket PC. Requires the miniSync
Retractable Sync Cable.