Check the "battery use" under settings>power.
While charging, it will say "Charging (USB)" or "Charging (AC)". If it is charging (AC), then your cable is ok, just make sure your charger's output rating is 5V x 1A.
Also, note that if your in a hot country, and your phone is under the windsheild, under sunlight, the phone would heat up & not charge (light will flash red).
Tornado "imate SP5", Trinity P3600 (sold) - TyTN II (sold) - Diamond (sold) - Diamond2 (sold) - HD2 (broke!) - Sensation(sold) - One X - (T3, sold).