My '11 DB9 hated the antigravity battery. I could barely get out of the neighborhood before it went into various shut down modes, such as emissions ( but shutting down kind), and my least favorite, Crash mode.

I wanted to like it, but either the recharge algorithm is incompatible, or their electronics is putting some noise on the DC bus that the car doesn't like. I returned it and they tested and said it was okay so they just gave me a refund.

I ended up putting in a H6 sized AGM battery and everything's been fine all year.

 

Thanks for the heads up! Maybe not worth the expense / effort then

 

I have been running the anti gravity battery in my V8 Vantage since December with zero issues. Took over 40 lbs out and has built in jump start. No brainer for price paid. Thinking I should do a write up on it to help bring some clarity. Will try to make time this weekend and create a thread.