Default Battery Charging Status Details

So I dont know if a similiar thread like this exists but I wanted to know if theres any way to find out how many amperes are going into my Nexus 7 during charging through an AC source. I did find alot of apps that tell me what voltage the battery is putting out but I wanted to know how many amperes does my nexus charge at. It isnt always 2A so thats what I wanted to see. It isnt as easy as checking the charger with a multimeter so dont suggest that.