yea i have a older tw and so if i put a outlet in i just have to make sure nothing is plugged into the outlet right? the actual outlet mount can stay plugged in? and yea I know what you mean about leaving stuff plugged inCheck ebay or amazon. I have an emgo outlet that comes with a cigarette lighter. Like lizard said, try not to run an inflator while the bike is not running. Also, be careful not to leave anything plugged in overnight or you will likely be purchasing a new battery. Once they have been drained past a certain point they will not recharge. Don't ask me how I know this
You can run a GPS or a phone charger pretty much continuously. Just unplug them at day's end.
I soldered and heatshrinked ours tee'd into our Battery Tender pigtails. Uses the Tender leads' blade-type fuse. Two birds, one fuse, so ta speak.
Here's the basic gist of our outlet wiring. I used the standard Tender plug which mounts to the battery terminals and comes fused. It attaches as normal. The wires going forward go to the outlet, which is permanently mounted to the indicator light housing. The whole thing is heatshrinked, with an added layer of tape.
Excuse the mud. I layed it out on a towel. I don't like you guys well enough to take the whole thing apart right now, but the same fuse covers the Tender when it's hooked up and the outlet when it's not:
There's a downside to having only one outlet. If you fuse it heavily enough for an air compressor you could be overfused for more delicate electronics. Best case would be to have two, or use one of those tender outlets you found, fused for the heavier loads, and reserve the other for GPS and cell use.
This particular brand has held up well. I've left the springs under tension by leaving plugs in there for weeks and it still snaps shut with authority. Think I bought them at a Pilot truck stop a few years ago.