I too fried my sator, replaced it with the ricks unit and alien motion lithium battery, been great ever since the change, the battery is a champ and strong as all heck and holds charge VERY well. Besides the fact of it being small and light I've been nothing but happy with it, and the ricks stator. Previous owner replaced the rec through the dealer so I think I'm good.
I would without a doubt warranty the battery With AM and continue if I had any issues. At idle It holds a solid 14.7V and doesn't dip below 13.2 sitting.