Engineer's Voltmeter

The Engineer's Voltmeter is a tool added by Immersive Engineering. Right-clicking a Redstone Flux (RF) Capacitor (like the LV Capacitor) will yield the player it's total energy storage via Chat (the tool itself requires no energy or durability to use). Shift-right-clicking a pair of Wire Connector (like the LV Wire Connector) will give the player the average RF loss between the two points.