Battery question

[vernon]

That's what I would have recommended.

Yeah, right...........

[Larry Eby]

If no one mentioned. Sams has their group 27 wet cell deep cycle at $59 with core exchange limit 3. Other group sizes have similar savings for a short period of time. East penn batteries

[rogerdodger]

Well I hate to say it but baby it’s Walmart ever - starts for me all the way  l get 4.5 yrs if I maintain them properly. I keep em. Charged and topped of w distilled water. I have learned to buy new ones at the start of the fifth yr. when they go they go hard and you’ll know it. With these you are guaranteed to get the freshest factory to store it’s just simple math with the number they sell. I’ve seen batteries at boat dealers that were two yrs old!!

[Longball22]

I had replaced some trolling batteries a few years ago with Interstate 29DC's, and after a few months one of the post actually broke off, exposing one of the cells.  Interstate claimed it was due to corrosion, of which there was none on the batteries (I had bought these at an Interstate company store).  Installed with lock nuts, they were well secured, etc.

I ended up buying an Everstart to replace the failed battery, and if you put the two side by side, I noticed that the shell of the battery was identical in every way.  Not claiming internals are identical, but they definitely came out of the same facility.

[jdmidwest]

While we are on the discussion of batteries, I am upgrading the Tracker to 24V and adding a battery box up front to house the new cells.  Looking at the schematics on Motorguide manual, it shows a connection to all negative posts of all batteries in serial in the boat to avoid corrosion and other issues.  That is the first I have saw that.  Mine came from factory wired motor and electrical system to one battery, trolling motor to the other.  But no common wire.

How relevant is that in an aluminum boat?

[fishinwrench]

If you're talking about a ground strap from the TM(-)battery terminal to the hull..... there's no need.  The trolling motor isn't in the water all the time, and even if it was the TM shaft is probably composite, so galvanic corrosion isn't an issue.   The hull is already grounded to the cranking battery through the outboard motor harness.

[jdmidwest]

That is what I was thinking, but their wiring diagram shows all negative connected and no ground wires to boat.