band gap usb patch

diff --git a/libraries/hexbright/hexbright.cpp b/libraries/hexbright/hexbright.cpp
index 50c7f5f..e96b0e1 100755
--- a/libraries/hexbright/hexbright.cpp
+++ b/libraries/hexbright/hexbright.cpp
@@ -1090,8 +1090,13 @@ int band_gap_reading = 0;
 int lowest_band_gap_reading = 1000;

 void hexbright::read_avr_voltage() {
-  band_gap_reading = read_adc(APIN_BAND_GAP);
-  lowest_band_gap_reading = band_gap_reading < lowest_band_gap_reading ? band_gap_reading : lowest_band_gap_reading;
+  static unsigned char battery_time = 0;
+  if(get_charge_state() == BATTERY) {
+    battery_time++;
+  } else if(battery_time>200) {
+    band_gap_reading = read_adc(APIN_BAND_GAP);
+    lowest_band_gap_reading = band_gap_reading < lowest_band_gap_reading ? band_gap_reading : lowest_band_gap_reading;
+  }
 }

 int hexbright::get_avr_voltage() {