Well, I have started the Spyder regularly and let it run just to make sure it would start. Planned a 6 hour ride to the coast today for a long weekend. About every week, I would start the Spyder and let it run for 10-20 minutes. Started yesterday just fine. Kept it on trickle charger. All was well and I thought my issues were behind me. Well, went to start it and back it out to get all our headsets and phones connected and... no start. I blamed the battery so, got a DieHard battery. Still no start. Turns over fine. Performed the update that it said was available, no help. I am now charging the 'NEW' battery for one more shot. Did not use a screwdriver to tighten the battery connections. I used a ratchet. It will be going to the dealer whether it ever starts or not.
At the risk of adding yet another one to the
many, MANY times that this has already been posted here by a fair few people who've probably forgotten more about batteries and electronics than I ever knew, buuut:
THESE BITS ^ are the
ABSO-FREAKIN-LUTELY WORST THINGS YOU CAN DO TO YOUR VEHICLE &/or A BATTERY, short of dropping a large screwdriver across both terminals!!
Even if your charging system is in top spec, it takes
AT LEAST 30 minutes of running just to replace the power drain you hit your battery with by
starting it; so starting it and then
only running it for 10-20 minutes, then compounding it by repeating that each week or so, means that you're just killing your battery (maybe not even slowly!!

) and leaving it on a trickle charger
ALL the time doesn't help either; plus, since you've started the engine and introduced all sorts of acids, condensation, and contaminants into the oil/your engine, only then run it for short periods weekly only don't run it for long enough (preferably at road speed/under some varying load & cornering forces to get the oil everywhere it needs to go) you're not ever letting the
OIL get hot enough to burn out all the condensation & those contaminants out again (even if your COOLANT might get up to temp!) so you're also slowly killing your engine/trans!!
If you park your Spyder up (or any vehicle, really!) for any extended period, either disconnect the battery (maybe even remove it & put it away, somewhere warm & safe) or connect it up to a reasonable quality tender/
maintainer, and then
DON'T START YOUR ENGINE again until you can start it up and give it a good 30+ minutes ride/drive! Doing what you tell us you've been doing up there ^ is a sure-fire recipe for killing batteries & eventually, engines/trans too, even if you
do use a trickle charger (but not a tender/maintainer, they are very different animals!) Leaving your battery on a trickle charger
ALL the time without a regular maintenance cycle can boil the battery &/or hide a failing/dying battery, maybe even leaving you juuust enough of a float charge to get the engine running, which, because the engine will pretty much run off
just the alternator output, it will then let you ride off, maybe until you are well away from home. If this is the case and you shut it down out there somewhere, that dead/dying battery can leave you stranded with little or no battery power! The initial start off the 'barely there' 12v float charge is possible cos you just unplugged the trickle charger, but if your battery has no real capacity left to back up that float charge and you ride off on the alternator output only, you're risking being left with a dead battery somewhere waaaay up the creek, without a paddle, and maybe also a loooong way from home &/or any help!! And, don't forget that
ANY new battery
NEEDS to be properly prepared and charged before installation (usually 8+ hours on a proper 'charger'!!) or at best, you'll shorten its potential life, and at worst, if the thing never got a real charge to start with, you might even kill that new battery by loading it up when it only had a very light 'proof of function' charge rather than a full on charge to capacity!!
So I'd guess that you created the initial 'no start' problem in the quote above for yourself, thru keeping it on a trickle charger and those '
start(ing) the Spyder and let it run for 10-20 minutes' every week episodes; and then unless
you personally ensured that the 'new' battery had been properly prepared
AND CHARGED before trying that, you just continued your 'lack of battery capacity' issues!
But
YES, putting the 'new' battery on charge (a proper 'charger' tho, not just a trickle charger...

) for
AT LEAST 8 HOURS is a good next step; which, with any luck, will see you back on the road. Only then, please do remember that you need to ride/drive
at least 30+ minutes just to replace the battery capacity lost thru one start, let alone starting on charging it even just close to full charge; so
DON'T start it if you're not going to ride it for at least 30+ minutes; remember that it also takes
at least that long to even
start to boil off all the condensation and contaminants gathered in your oil during its standing periods and that initial start; and if you're going to be riding again within a week or so,
DON'T USE A TRICKLE CHARGER OR EVEN A TENDER all the time!! 