Charriot said..
I just installed 2 set of Century Battery - Marine Pro, MP730, 730CCA from BCF
deep cycle 100 A available.......believe they not true deep cycle just more resilient for discharge
Guess design to withstand saling conditions.
Allready tested with 80W solar as the only charge available.
Very happy with them.
Not sure what would justify to spend triple amount of money for true deep cycle bat.
if only advantage is deeper discharge / most charges don't like it anyway / .

Lithium batteries are af course superior compare to lead acid, I have some, they can supply
30 times rated current without damage.
They are strict rules charging and discharging.
Each cell / regardless/ how many are paraller must be charged individually to max 4.1 Volts
and temperature must be monitored too.
Discharge limitation af course apply too.

Watch which ones you playing with LiPo - LiFe - Li Ion, they not identical.