I always put my battery tender on the bike every time I pull it into the garage for the night. Not sure about what is meant by your comment. I want to learn. Can you please elaborate. I use the "NOCO GENIUS1: 1A 6V/12V Smart Battery Charger Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation" and I have the "YTX24HL - Yuasa Battery" on my bike. Am I doing something wrong?
YES, putting your battery on a tender
EVERY TIME you 'pull it into the garage for the night' or after a ride can and will potentially hide a dying or dead battery by letting you start it the next time you go for a ride, due to the residual 'cover charge' the tender leaves in the unused battery for an hour or so after you disconnect it. If you only ever disconnect it immediately prior to riding, that'll mean that you can usually start it up at home on that residual charge and ride away; cos once it's over the increased load of starting (taking all the residual charge) the engine & electronics will run OK off the alternator alone, even if your alternator is not actually able to return any charge to your battery cos it's dying or dead, or even just severely depleted cos your last few runs have only been short runs that were not long enough to return/top up the battery after the drain imposed by repeated starting loads!! So then, once you're well away from home, maybe a long way and out in the middle of nowhere, when you next shut down your Spyder, you might not be able to re-start it!!
Of course, this doesn't happen
every time you leave your Spyder connected to a tender/maintainer, only when your battery has been subjected to repeated short runs (running it repeatedly for less than 30 mins at highway revs is not good); when it's been improperly charged/maintained for too long; or when it's been left sitting for too long without use or maintenance, generally somewhat more than a week or so; but then again, you never really know when your battery is going to die on you, do you?! Wanta risk it??
So it's best if you DO NOT connect your Spyder to your tender/maintainer immediately EVERY TIME you return from a ride!!
It looks like you've got a reasonably good tender, but your Spyder battery shouldn't need to be on the tender/maintainer if you're planning on riding again within a week or so -
just leave it off that long! And if you've left it connected for a couple of weeks cos you didn't plan on riding during that time, but now you're planning on riding this weekend (ie. a couple of days away) just disconnect it
NOW, ie, Wednesday or Thursday, giving it a couple of days to settle so that when you
DO go to start it on the weekend, it'll be starting off the charge
FROM THE BATTERY, not just of the residual cover charge from the tender/maintainer! And then when you go to start it in a couple of days time, if it hesitates, or is slow cranking, or maybe shows you a blank dash screen for a second or two, or you get an odd VSS or Brake error, maybe even a whole bunch of errors, then it's telling you to check your battery, cos all those things are signs of a dying or dead battery!! But at least if it's showing you that
AT HOME, before you've left on a ride, and not when you're an hour or more's ride away from home!
So to summarise,
just don't put your Spyder on the tender/maintainer every time you pull it into the garage for the night/after a ride - if you're riding again within a week or so, leave it off the tender/maintainer! And if you're planning on riding soon, take it off the tender/maintainer well before - a couple of days before is ideal; but the night before is OK if that's all you can! Good batteries
SHOULD NOT NEED to be left on a tender/maintainer all the time, and even if you're using a tender/maintainer that won't kill your battery by doing that (but
some will!) it can fool you into thinking your battery is still good when you start at home/straight after taking it off the tender/maintainer, only for you to discover AFTER you've ridden away and stopped for any reason, than now it just won't start anything, or gives you an error/cascading multiple errors &/or dumps you into Limp Home Mode when you're miles from help!
And as oldguy discovered, it always pays to take it off the tender a day or so before you want to use it again. Sure, that way you might still be caught with a dead battery when you do go to use it, but at least you're home & you might be able to do something about it!! 
