BatterySensor.patch

diff --git a/Battery.cpp b/Battery.cpp
index 0c61063..dc444e3 100644
--- a/Battery.cpp
+++ b/Battery.cpp
@@ -36,13 +36,16 @@ void Battery::begin(uint16_t refVoltage, float dividerRatio) {
 }
 
 uint8_t Battery::level() {
-       int16_t sense = this->voltage();
-       if (sense <= minVoltage) {
+       this->level(this->voltage());
+}
+
+uint8_t Battery::level(uint16_t voltage) {
+       if (voltage <= minVoltage) {
                return 0;
-       } else if (sense >= maxVoltage) {
+       } else if (voltage >= maxVoltage) {
                return 100;
        } else {
-               return (unsigned long)(sense - minVoltage) * 100 / (maxVoltage - minVoltage);
+               return (unsigned long)(voltage - minVoltage) * 100 / (maxVoltage - minVoltage);
        }
 }
 
diff --git a/Battery.h b/Battery.h
index 6593853..1a41050 100644
--- a/Battery.h
+++ b/Battery.h
@@ -46,6 +46,7 @@ class Battery {
                 * completely full battery.
                 */
                uint8_t level();
+               uint8_t level(uint16_t voltage);
 
                /**
                 * Returns the current battery voltage in millivolts.