I'd keep the heater, but the battery can be taken out. I've been running the same single odyssey battery for almost 8 yrs now./QUOTE]
If you've got the money, they're the best you can buy.
I get red tops because they're really cheap now off Amazon Prime.
Also, I mentioned the Platinum DieHard batteries because DieHard bought Odyssey and I've read they put that technology into the Platinum series. Then you can buy them local and avoid shipping for warranty.
Personally, I think if the heater grid (I had ripped mine out of the truck in 06 after I got it in 04) warmed something besides just air, it'd be helpful. Cause correct me if I'm wrong... The air is only moving if you're already started and running..... Lol