Samsung SPH-D710ZKASPR - Manual (Page 13)

Get Started 11
 Replace the battery compartment cover, making sure all the tabs are secure and
there are no gaps around the cover.
Note: When you insert the battery, your device may power on automatically.
2. Plug the USB connector into the charger/accessory jack on the lower middle side of your
device.
3. Plug the AC adapter into an electrical outlet. Fully charging a battery may take up to
three hours.