2 batteries for 12v

[Panfish Man]

I'm not getting enough run time while on the water and want to go with two batteries. I have a 12v power drive, and would like your opinions on how to run two. I have heard that connecting the two in parallel won't last as long as just having two, and switching from one to the other. So how would I go about hooking this up? I don't want to have to move terminal from one to the other, so how could I get this setup to work for me?

[Embrey]

I'm not getting enough run time while on the water and want to go with two batteries. I have a 12v power drive, and would like your opinions on how to run two. I have heard that connecting the two in parallel won't last as long as just having two, and switching from one to the other. So how would I go about hooking this up? I don't want to have to move terminal from one to the other, so how could I get this setup to work for me?

mine are together and i can troll daylight till dark and not phase em. now ,catching fish...thats a different story

[kydonky]

The best way is to run EQUAL lenghts and guage of cable from both the + and - terminals on both batteries to a central block or point you can connect your two 12v wires to.

batt 1 (+) (-)
l l
l l
central connect O------ O-------- l l l l
l l l l
batt 2 (+) l (-) l
l l
l l
l l
boat 12v + wire- l l- boat 12v - wire
l l
(+) O (-) O