Samsung SPH-a860 Series User Manual page 21

Using the Travel Adapter
Plug the travel adapter into a electrical outlet and into the Power
Interface Connector found on the bottom of the handset. If properly
connected, the handset indicates that the battery is being charged
either by an animated battery icon when the handset is on or the
word "Battery Charging" when the handset is off. The LED will be
red.
Note: It takes approximately 4 hours to fully recharge a completely
drained standard battery. With the Samsung approved LiIon battery,
you can recharge the battery before it drains completely.
Getting Started 13