LG LGAS876 - Manual (Page 12)

12 The Basics
Step 4. Replace the Back Cover
Place the cover over the back of the phone, then press down along the
edges to secure the cover.
Step 5. Charge the Phone
Before turning on your phone, fully charge the battery. Be sure to use the
USB cable and Charger adapter that came with your phone. Correctly orient
the USB cable plug before inserting it in the USB/Charging Port to avoid
damage to your phone. See Charging the phone on pages 15 & 16 for
more information.
NOTE It’s important to fully charge the battery before initial use of the phone.