Del foro oficial de motorola :
https://motorola-global-portal.custh...50/action/auth
"Any Motorola charger with the correct micro-USB tip will charge your Moto G. You will see the best results when the output of the charger is between 500 mA and 1.5 A. The higher the output, the faster your Moto G will charge."
Yo estoy cargando el mio con el del motorola defy (de output 5v y 850mA) y carga bien rapido y sin peligro.