My first marker, was a Spyder Pilot. Those damn 9.6 volt batteries are the reason I got rid of it. I liked the marker a lot. Was easy to maintain, never broke paint (I had the ACS bolt) and was very reliable...when the battery was charged.
It is very easy to leave Spyders turned on and not realize it. There is no auto shut off after some period of no-use.
My battery used to take more than 5 hours to completely charge too. It would be almost 8 hours before the light would change colors on the charger.
Charge it up again and make double-triple-extra sure you turn off the board. It should stay charged for longer than three days, but I used to charge mine the night before a game rather than after a game.
The object to life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, with a big smile shouting, "Holy S#*t ...what a ride"!