cosmetic: battery related stuff

components/port_bsp/adc_bsp.cpp

@@ -48,3 +48,7 @@ uint8_t Adc_GetBatteryLevel() {
 	//ESP_LOGW("Battery","Voltage: %.3f V, Level: %.1f %%",vol,level);
     return (uint8_t)level;
 }
+
+bool Adc_IsCharging() {
+    return Adc_GetBatteryVoltage() > 4.10f;
+}