If you're running an Advent you likely won't be able to crank your motors with this. A better bet (for Advent and TL), although more expensive would be Deka's smaller batteries. Here are their available batteries in the size range for our skis and specs (the EXT16/16L are the most common heavy ones a lot of us use):
Brand Model CCA AH Weight L W H
Deka ETX9 120 9 7lbs. 5.9 3.4 4.2
Deka ETX12 180 12 9lbs. 5.9 3.4 5.2
Deka ETX16 275 16 17lbs. 6.9 4 6.5
Brand Model CCA AH Weight L W H
Deka ETX9 120 9 7lbs. 5.9 3.4 4.2
Deka ETX12 180 12 9lbs. 5.9 3.4 5.2
Deka ETX16 275 16 17lbs. 6.9 4 6.5