Cigarette socket battery drain?

[ZuluHour]

I want to electrify my tankbag and I'm concerned about battery drain.  It seems like a common method is to run a fused cable direct from the battery up to the tankbag and then convert to whatever you need.  With it being directly connected won't my battery drain whenever the bike is on and not running?  I guess the simple solution is to unplug or turn off my gadgets when the bike is off then right?

Did I just answer my own question...

[Cablebandit]

That, or wire it as a switched circuit that is only hot when the bike is on.

[zer0netgain]

You kinda answered your own question.  

A lot depends on what you are running.

Most devices drain so little power that you can leave them plugged in and turned on with no danger for several hours when the bike is off.

Only you know how much juice your accessories are drawing.

When in doubt, flip the "off" switch, use switched power or unplug.

[veefer800canuck]

If it's a cell phone or GPS, the power drain is negligeable for several hours as stated previously.

I used to have an LG flip phone, and when I was travelling with the bike, I would tuck the power cord with the flip phone attached under my seat and leave it attached to the battery all night to charge the phone.

Never had a problem starting the bike in the morning.

[Rincewind]

I would wire in a quick disconnect for when you remove the bag from the bike.  If you don't want to do it with Powerlet outlets, use SAE connectors.  

The Powerlet "electrix" products seem to be pretty nice for doing this -- http://www.powerlet.com/shop-by-product/luggage-electrix/LUGTRIX

Some accessories such as my Zumo will say that they are 'off' but will continue to draw power to charge the batteries, resulting in an eventually dead bike.  

[Snowdog]

Run from the battery via a relay triggered by something switched with the ignition, the rear brake light switch or rear lights being the most convenient for an under-the-seat install.

[ZuluHour]

If I had the time I'd prefer making it a switched circuit, but I'm planning on flying out to pick up the bike and will be installing the connection the evening before I leave.  I think I'll be getting the PTB-001 from eastern beaver, http://easternbeaver.com/Main/Elec__Products/Powerlet/Tankbag_SAE/tankbag_sae.html, along with the fused battery cable w/ the SAE quick disconnect end.  I'll just put a dual cigarette connector inside the bag to power my GPS and my phone.  I might get that $20 cigarette to USB adapter to power my Ipod as well.

Thanks for the replies everyone, I feel like I've got this part figured out now!