Accessory Battery - what CCA or MCA? No markings on batteries? 99 340 DA

[Soul Mate II]

Afternoon - I have a '99 340 DA, just had my batteries tested. Accessory batteries came up 57 and 63 CCA and the voltage was below 12 volts. I assume they are group 27 based on the size. Any idea what CCA or MCA I need? I know I don't need starting batteries, should I get the dual batteries?

Thanks for the help - there are no markings on the battery. I do I have Deka Marine Master and RV Batteries. The label is blue not sure if that designates anything. They are deep cell and it says heavy duty power for trolling motors, house power and accessory loads.

Any help is appreciated!

 

[Wylie_Tunes]

Any idea what CCA or MCA I need?

You need to shop the Ah and RC rather then CA.

 

[bobeast]

Just find the biggest most BA batteries that will fit. When it comes to Amp hours, more is better. CCA is not really relevant in this usage.

 

[wayne0]

Just find the biggest most BA batteries that will fit. When it comes to Amp hours, more is better. CCA is not really relevant in this usage.

Yeh, this!