Samsung SGH-ZX20ZKACIN - Manual (Page 9)

Section 1: Getting Started 9
6. Press the battery down until it clicks into place. Make sure that the battery
is properly installed before switching on the power.
Charging the Battery
Your phone is powered by a rechargeable Li-ion battery. A travel charger comes with
your phone for charging the battery. Use only approved batteries and chargers. Ask
your local Samsung dealer for further details.
The travel charger allows you to use the phone while the battery is charging, but this
causes the phone to charge slowly.
Warning: Only use the charger provided with your device or a charger approved by
Samsung for use with your device.