diff --git a/README.md b/README.md
index b51549a..0dbb94e 100644
--- a/README.md
+++ b/README.md
@@ -29,3 +29,9 @@ GND      |  GND
 Out      |  A0
 
 Out defaults to A0 (AdcChannel0), but can be set manually in `ADC_CHANNEL`.
+
+## Power Consumption (Arduino Nano)
+Mode      | Unmodified | No voltage regulator | No TTL module or voltage regulator
+----------|------------|----------------------|-----------------------------------
+Waiting   | ~10mA      | ~5.8mA               | ~6μA
+Recording | ~26mA      | ~25.1mA              | ~25mA