Sanyo SCP-4000 - Manual (Page 80)

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Charging Times with Accessories
Standard Lithium Extended Lithium
Ion Battery Ion Battery
AC Adapter Charger 3.0 hrs. 5.0 hrs.
Cigarette Lighter Adapter 3.0 hrs. 5.0 hrs.
Dual-Slot Desktop Charger 3.0 hrs. 5.0 hrs.
The accessories listed above are available for purchase at most
Sprint PCS Centers, or call the Sprint PCS Accessory Hotline SM at
1-800-974-ACC1(2221).