Voltage is the force and is measured in volts (V). A typical flashlight battery produces 1.5V, and the standard household electrical voltage is 110V or 220V. Advertisement if (typeof googletag !== 'undefined' && HSW.utilities.isMobile() === true) { googletag.cmd.push(function() { googletag.display('ad-div-mobRectangleInline'); }); } (adsbygoogle = window.adsbygoogle || []).push({}); ­Electrical current, or flow of electrons, is measured in amperes (A). The product of electric force (in volts) and current (in amperes) is electrical power, measured in watts (W). A battery generating 1.5V and producing a current flow of 1A through a flashlight bulb delivers 1.5V x 1A = 1.5W of electrical power.