I think it will ruin your gel cell battery. Your battery needs to be charged at maybe 0.5 amps. Normal deep cycle battery chargers often put out 2 amps as a minimum and maybe 10 amps max which is too harsh for the gel cell.
That is how I heard it from Vexilar staff when I called in with your question a couple of years ago.
I went down to Radio Shack and bought a little 0.5 amp charger for about $10. Had to cut off the end connections to add ones that fit my the battery posts but that was simple enough.
Good luck and don't ruin your battery.
I messed up my old Vex battery charger by wrapping the cord too tight around the plug in box when I was storing it. It eventually cracked the power cord going into the box. I wrap it fairly loose nowadays and have not had a problem.
jjT
