diff --git a/lipo-charger.c b/lipo-charger.c
index fc1c013..e34a427 100644
--- a/lipo-charger.c
+++ b/lipo-charger.c
@@ -44,8 +44,8 @@
 
 /*
  * power supply:
- * - CH0 - voltage with 10:1 prescaler
- * - CH1 - current with 10mA -> 1mA
+ * - CH0 - voltage with prescaler (12V -> 2V; 15mV -> 2.5mV/bit)
+ * - CH1 - current with (1A -> 1000mV; 2.5mA -> 2.5mV/bit)
  * - PWM - high-active output to buckconverter
  */
 #define CH0	PORTC0