diff --git a/src/devices/tech/power/values.jd b/src/devices/tech/power/values.jd
index 912b2b6..e75d50a 100644
--- a/src/devices/tech/power/values.jd
+++ b/src/devices/tech/power/values.jd
@@ -33,6 +33,12 @@
 the values (deriving differences from other baseline power uses as appropriate).
 </p>
 
+<p>As the goal of a power profile is to estimate battery drain appropriately,
+power profile values are given in current (amps). The Android framework
+multiplies the current by the time for which the subsystem was active and
+computes the mAh value, which is then used to estimate the amount of battery
+drained by the application/subsystem.</p>
+
 <h2 id="multiple-cpus">Devices with heterogeneous CPUs</h2>
 
 <p>The power profile for devices with CPU cores of heterogeneous architecture