John H wrote:
On Fri, 11 Jun 2010 22:31:12 -0400, Larry wrote:

Jay-T wrote:
I am getting ready to buy a back-up battery and battery case for a
13-foot aluminum boat that I have. The battery will be for the
electric trolling motor. The reason for the second battery is for
use if the first battery starts to run low and so that I will be
sure to have enough back-up power to use the trolling motor to get
back to the boat launch area. The boat also has a gas engine, but
it is a rope pull-start type so the battery won't be used for
starting a gas engine.

I'll probably go to West Marine or someplace similar to buy he
battery and battery case, and hopefully they will be able to tell
me what type of battery to get. But, just in case they don't know
or they give out wrong information, I thought I'd check here to see
what people recommend that I look for and buy.

Thanks.
If you just want a decent deep cycle go to Walmart and pick one up.
IIRC, there are only a handful of manufacturers making conventional
lead-acid batteries but they have many private labels. If you want
to spend some bucks for the latest, and greatest, look at the AGM's
and Gel Cells.

What he said.

The only advantage to a West Marine battery is that they cost more.
WalMart is the way to go for a deep cycle, which is what you need.

Great info about Wal-Mart. I went there yesterday and there were two models
to choose from: a 24DC-6 for $58; and a 27DC-6 for $70. Unfortunately,
they didn't have any of the 27DC-6 model left in stock. I'll probably try a
different Wal-Mart today to see if they have the 27DC-6 in stock.

The info on the two models was:

24DC- 6
CA/CCA 500/405
Reserve Cap. 100
Amp Hours 75

27DC-6
CA/CCA 720/600
Reserve Cap. 160
Amp Hours 115