How are you guys that use 3-4 units powering them?

I have a Duracell 31AGM for cranking and electronics and 10 gauge wire throughout. If the Solix 15, 12 and 360 are left on at full brightness, cranking the engine by the mid afternoon will drop the amp supply to the units enough to cause them to shut off and restart. The engine doesn't seem to mind, but the Solix's are very sensitive to amp drops. I'd like to connect two 31AGM's in parallel but I don't currently have the room to pull that off.

To the original question: As with rods, reels, lures, shallow water anchors, automatic trolling motors, boats and sonar units, if you have the money to blow, it's just nice to have the biggest and baddest available.

I ALWAYS sleep my rear units now when I go to the bow. I have a intimidator agm group 31 starting battery. (been told by many this is the BEST battery out there hands down @78 lbs it better be good) Starting my motor will turn off one unit on my console if I get to a low voltage, but I only got to that one time when Ive just left the rear units on and I think it was after 7 maybe 8 hours of tm fishing only. Ive considered adding a lithium battery for starting only, but it really hasnt been a issue except the one time for me. I do have a small jump box I carry just in case. I usually am fishing no wake lakes so not much chance at re charging on the lake.

I don't understand why people have different brands side by side. I guess some people like the mapping of one brand and the graphing of another?