Wirelessly posted (Hivemind: Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)
Nope, it still drains. If you look at a cable plug, there is the tip and the sleeve. If you're familiar with a tea plug, there is a tip, ring and sleeve. The ring sits at the end of the sleeve, next to the tip. In an emg setup, the ring part of the jack is hooked up to the battery, and the sleeve is ground per usual. When you plug in a standard cable, the ring and sleeve parts of the jack both touch the sleeve on the plug, closing the circuit.