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 1200mAh Palm Treo 750 Standard Battery that shipped with the handheld.
BoxWave Extended Treo Battery
Extend your Palm Treo 750's use time with BoxWave's new ElectraSpan Extended Battery. This 2400mAh high capacity rechargeable lithium ion (Li-Ion) battery that is specifically designed for your Palm Treo 750. The ElectraSpan extended battery is the essential accessory for Palm Treo 750 users who can’t, or don’t, want to worry about missing a charge. Includes extended battery cover.
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 Treo. Requires the miniSync
Retractable Sync Cable.