How to calibrate a new Nexus 5 battery that's higher capacity than original?

Just got a KBTEL battery that's 3800 mAh compared to the original 2300 mAh nexus battery. I charged it dead overnight, and now its been running for more than 7 hours and the capacity shows below 5% for an hour now but its not dying. How do i get the battery meter to show the actual range? The system still detects a 2300 mAh battery.