Import Variables from another active script

I want to permanently access the “battery” var and “batteryMax” to create a “BatteryLifebar”
How do I access this var without “GameObject.Find…”?
flashlight.js:

var lightintensity : float = 100;
public var battery;
var time : float;
var time2 : float;
var flashingTime : float;
var batteries : int = 0;
public var batteryMax;

var Sound_Battery_PickUp : AudioClip;
var Sound_Flashlight_Toggle : AudioClip;
var Sound_Flashlight_Reload : AudioClip;

var batteries_text : GameObject;

function Start () {
	battery = 100;
	batteryMax = 100;

}
function PickUp (energy : int) {
	batteries += energy;
	audio.clip = Sound_Battery_PickUp;
	audio.Play();
}

function Update () {

	batteries_text.guiText.text = "Batterien: " + batteries + "

Ladung: " + battery + “/” + batteryMax;
if (Input.GetMouseButtonDown(2) && batteries > 0 && battery < batteryMax){
lightintensity += 0.83*20;
batteries -= 1;
battery += 50;
if (batteryMax < battery) {
battery = batteryMax;
lightintensity = batteryMax;
}
audio.clip = Sound_Flashlight_Reload;
audio.Play();
}

	Screen.showCursor = false;
	Screen.lockCursor = true;
	
	if (light.enabled == true && battery > 0) {
		time += Time.deltaTime;
		if (time >= 1){
			time = 0;
			battery  -= 1;
			lightintensity -= 0.83;
		}

		
		if (battery <= 15 && battery > 0) {
			time2 += Time.deltaTime*4;
			if(time2 >= flashingTime) {
				time2 = 0;
				flashingTime = Random.Range(0.1, 1.2);
				if (light.intensity == 0.25) {
					light.intensity = 0.0;
				}
				else {
					light.intensity = 0.25;
				}
			}
			
		}
		else {
			if (battery > 0) {
				light.intensity = lightintensity/100;
			}
			else {
				light.intensity = 0;
				lightintensity = 0;
			}
		}
	}
	if (battery <= 0) {
		battery = 0;
		light.intensity = 0;
	}

	if(Input.GetMouseButtonDown(1)){

		if(light.enabled == true){ 
			light.enabled=false; 
		}
		else{ 
			light.enabled=true; 
		}
		audio.clip = Sound_Flashlight_Toggle;
		audio.Play();

	}

}

batterybar.js

var battery;
var batteryMax;

var batterybar : Texture2D;
var background : Texture2D;

function OnGUI () {
	GUI.DrawTexture(Rect(0,-10,batteryMax,30),background);
	GUI.BeginGroup(Rect(0,-10,battery,30));
	GUI.DrawTexture(Rect(0,-10,batteryMax,30),batterybar);
	GUI.EndGroup();
	
	if(battery < 0){
		battery = 0;
	}
	if(battery > batteryMax){
		battery = batteryMax;
	}
}

Thats really easy you could just reference the Object that contains the script or You could call FindGameObject at Start

var battery;
var batteryMax;
 
var batterybar : Texture2D;
var background : Texture2D;
 

public var BatteryScriptHolder:Transform;

private var BatteryScript:yourBatteryScriptName;//scripth that has the maxBattery var's

function Start()
{
 BatteryScript = BatteryScriptHolder.GetComponent(yourBatteryScriptName);

}

function OnGUI()
{
 battery = BatteryScript.battery;
 batteryMax = BatteryScript.batteryMax;


 // rest of your code
}