^^^ the last couple years there is not a seperate battery anymore

 

 

It's not a question of the battery getting low. It's a question of the 12V bus sagging when the starter is pulling hundreds of amps from the battery. As we all know, Jag electronics are very sensitive to bus voltage; this is how they maintain a stable bus voltage during the restart - isolate the electronics power bus from the starter power bus.

 

I have disconnected the start/stop battery. Can I completely take it our from the car or does it have some other function?

 

If you've disconnected it the only function it can provide is ballast ... to slow you down.

 

Yes.
I ran with the second battery disconnected for over three years then a few months ago I took it right out of the car and nothing changed at all.

 

This is a great question. I got my Dealer to disconnect the second battery a couple of years ago while in for service. I never checked if they in fact removed it. But it would make sense to reduce weight.

 

Dumb question, but if i have my trickle charger hard wired in (as instructed by the other members here), will I have to change anything if I put in a non-OEM battery? Will trickle charging still work the same way as it always has or do batteries such as Antigravity etc.. get screwed up by that? Thanks in advance.

 

That all depends on what battery you put in the car. If you put in a Antigravity battery or any other Lithium type battery then you MUST use a lithium charger. Any other charger will damage the lithium battery.

Otherwise, if you put in an AGM battery then any standard charger will work on that type.

Your connections are not an issue. What is an issue is what type of battery you have in the car and what charger you are using to charge it.