[Roadsters] battery tender

[Tim]

I bought a battery tender about a week ago. After each drive since I 
have hooked it up and the next day the little light has always been 
green. I had the Roadster out last night with headlights on and an 
auxillary power jack running my garmin. Today,  about 18 hours since 
hooking up the battery tender, the light is still red (not that 
surprising I guess) but the plug end is very hot.

Anyone else experience this?

Thanks

Tim