Some Suggestions about a Battery Tender?, I'd love to hear from everyone! Options

[snowbunny]

Ok, so I have a wacky schedule with my job and it takes me all over the US for seminars and stuff, which unfortunately leaves my poor car at home, not being started for 2 weeks, sometimes 3 weeks on end!
This is my problem, My car wont start after sitting for 2 weeks,
I know my first suggestions should be to check the battery, check the alternator.
But I am pretty sure those things are still kickin',

Should I install some sort of Battery Tender, or Battery trickler?
Or any other suggestions?
*I have asked my roommate to start it, but recently we were both gone for 2 weeks, and it wouldnt start then, since it sat there the 2 weeks we were gone, AND its kinda weird asking him to start my car every couple of days while I'm gone*

So please send some suggestions my way!!

[Celiracer18]

you could get one. or you could just unhook the battery before you go.(yeah you'll lose your radio presets but look at it this way, you dont need to jumpstart your car)