Vex battery voltage testers are now available! $3 each!

VEX V5 General Discussion Product Announcements
1

Here they are! They come in 3 colors and are $3!
https://m.ebay.com/itm/VEX-robotics-micro-battery-voltage-tester-green-blue-red-/222720848040?skus=Model:RED&varId=521576193695

2

DOPE

but an lcd

3 
task LCD()
{
	while(true)
	{
		clearLCDLine(0);
		clearLCDLine(1);
		bLCDBacklight = true;
		string mainBattery, expander;
		displayLCDString(0, 0, "Primary: ");
		sprintf(mainBattery, "%1.2f%c", nImmediateBatteryLevel/1000.0,'V');
		displayNextLCDString(mainBattery);
		displayLCDString(1, 0, "Expander: ");
		sprintf(expander, "%1.2f%c", (SensorValue[in1])/275.0, 'V');//if you're using a power expander as well
		displayNextLCDString(expander);
		wait1Msec(100);
	}
}

This little piece of code has come quite in handy for the past few years for us.