diff --git a/doc/CURRENT-DRAW-MEASUREMENTS b/doc/CURRENT-DRAW-MEASUREMENTS
index 0780ef5..68893a0 100644
--- a/doc/CURRENT-DRAW-MEASUREMENTS
+++ b/doc/CURRENT-DRAW-MEASUREMENTS
@@ -1,4 +1,8 @@
-Yaesu FTH-2010 as a radio with 1W output power. All measured on B+ 12V line
+Yaesu FTH-2010 as a radio with 1W output power. All measured on B+ 12V line.
+Current draw of GSM module depends on signal level. TX power of MS in GSM network is regulated
+in closed loop by base station, so this measurement might not cover all cases. 
+GSM uses GMSK modulation and that 125mA is only an average. Momentary peak 
+when TX is keyed up might be way bigger (module itself can take up to 2A at 4V)
 
 
 deep sleep: 1mA
@@ -8,4 +12,4 @@ GSM off, sensors on, radio on receiving: 80mA
 GSM on (idle GPRS/TCP not connected), sensor on, radio on receiving: 94mA
 GSM on (idle GPRS/TCP connected 99mA), sensor on, radio on receiving: 99mA
 GSM on (comm with network), sensors on, radio on recieving: 125mA
-GSM off, sensors on, radio on txing: 650mA
\ No newline at end of file
+GSM off, sensors on, radio on txing: 650mA