Saving power by cutting servo supply

Projects General Guidance
9

retrolefty:
For cheap it's hard to beat this one on E-bay:

http://www.ebay.com/itm/New-1-Channel-H-L-Level-Triger-Optocoupler-Relay-Module-for-Arduino-5V-/221409246814?pt=LH_DefaultDomain_0&hash=item338d04fe5e

Thanks, but just wondering, obviously VCC on the relay module goes to arduino 5v, when the relay isn't doing anything is it still sucking power from the arduino?