My battery is in the twilight of its life and having recently read about ALL the benefits of Li-ion tech batteries over old fashioned Lead Acid ones, I'm debating to go with the former if poss?
Has, anyone done this? Has it been worth the extra expense or not, our cars seem to be inherently unkind to batteries, with draining them often inexplicably etc.
My current battery(no pun intended) is a 100ah 900cca,so I assume I'd need a Li-ion of similar power? Thanks in advance for any info..  2008 L322 Vogue 3.6 TDV8 in Java Black with parchment and Navy interior. 125000mls.

I used to be indecisive and have a split personality... but we are ok now...I think?

I have lots of experience with Li batteries on sports and race cars and bikes. The problem with the ff is the constant current draw so you need a large capacity, there are batteries out there big enough and there’s enough room, the problem is price, they are seriously expensive!

One feature Voltphreaks batteries have is the low voltage disconnect, you can mount the switch on the scuttle panel so if the battery is low it will switch off but you can simple press the button and have some life left to start, should allow you to run a smaller battery and not get stuck.