most powerful battery for the 456????

I just added a lot of new things to my stereo system and also installed HID headlights for my 456, I think I need a new battery that is more powerful. Anyone know what is the most powerful battery in the market right now that would fit? also where would I be able to find that in Hong Kong? As you all might know, the positive is on the left side for the 456, which is kinda hard to find.....please let me know if you have any idea......thanks in advance...

 

No clue where to find anything in Hong Kong, but here is a list of batteries available in the States. The original FIAMM battery is also on the list and I would look to see if Bosch's replacement batteries are available in Hong Kong.

If you want the toughest battery, get an absorbed glass mat (AGM) battery like the Odyssey or Braille batteries in the document, or the Bosch S6001/S6008/096 AGM battery, which has the correct terminal layout.
View attachment Ferrari Battery 02.doc

 

HID lights normally consume less power than their equivalent halogen lights (35W vs. 55W).

As for additional equipment, unless you installed something similar to what Pink Floyd used in Venice, you are probably well off with leaving it standard.
Whether you need to change anything at all depends very much on what you put in and how you are using it. Assuming you only use the equipment when driving, it is not likely that the battery will fail you, but rather the alternator may not be able to keep it topped up in certain conditions.

Get the current draw measured, or listen to the engine more often.

 

If you have an additional 15mm of head space above the battery you can upgrade from a group 91 to a group 48 battery.

There are anumber of excellent batteries in this size.

Odyssey PC1220 CCA=680, reserve=135 min
Exide Micro Hybrid EK700 CCA=760 (no reserve listed) Europe only
East Penn Deka 9AGM48 CCA=760, reserve=120 min

 

The biggest problem is "extra space": there isn't any.