I need to replace my old DMS red top 40 ( Varley ) battery. It has an advertised cold cranking (CCA ) of 500 amps and does start my big block engine OK, or did!
I am tempted to a Lithium battery as they are supposed to be better and weigh a lot less.
However they are rated on a different system to lead acid batteries so I am confused and ,at £700 a time, do not wish to buy the wrong one.
The biggest Li one DMS/Varley do is only equal to a redtop30 which is rated at 450CCA.
Other Li suppliers talk about pulse rate discharge which is higher number.
DMS give two numbers for their li-16 battery,
Short Circuit Peak Current 1470A Cranking Current* 670A
but then say that is only equal to the redtop 30 with 450CCA
So, is there some magic conversion ratio which lets me define the Li measuremernt of peak/pulse current to traditional CCA please?
Then I can look for the right Li battery !