Sounds like a dead short in one of the solid state components. It has a 3 year extended warrent for residences of Hong Kong.
Time to get out your VOM and start trouble shooting the circuit board. Look for like an LM317 or a zanier diode that’s gone south on you. Or if it uses one of the TI family Lipo single chips look here:
http://focus.ti.com/lit/ds/symlink/bq24103.pdf