Boat battery

[HUNTNORTHWEST]

Alright my main questions are the following.


Will these work in negative temperatures for a trolling setup.?

Also I’m seeing mixed results for a main motor cranking lithium application.?
Do they work for the main?

[BuckDuck77]

I replace my 48v golf cart with a lithium and man what a difference.  The bad part is now I want to do the same for my trolling motor batteries. You won’t be disappointed.

[GWP]

https://techwithtech.com/safe-temperatures-for-lithium-ion-batteries-ranges/

[goldenhtr]

My BIL recently added this to his boat and is thrilled with results. Best price he found was from Hodge Marine in FL.
https://minnkota.johnsonoutdoors.com/us/shop/battery-chargers/board-alternator?v=101926#learn-more-anchor

Only charges,
Battery Type   12v AGM, 12v Flooded Lead Acid

[storyteller]

As an added note, when you go to dispose of the  lithium battery, cheapest place I found  was  interstate battery, $5.00 a pound  for disposal, my Torqeedo lithium was 55 lbs, so $225.00 to get rid of it.

[HUNTNORTHWEST]

https://techwithtech.com/safe-temperatures-for-lithium-ion-batteries-ranges/

I appreciate the link. I googled it as well. Just looking for some real world experience.

I fish in eastern wa all winter not sure these will work. Also mixed results on using these as a cranking battery.

[CP]

There are different types of lithium batteries (6 or 7 anyway).  LiFePO4 (Lithium Iron Phosphate) is not what you have in your cell phone or your Tesla, or your ebike.  LiFePO4 is stable, doesn’t burst into flames, makes for a very good deep cycle battery. 

No battery likes the cold, but you can discharge LiFePO4 batteries when they are frozen.  But if you try to charge one while frozen, it will be damaged.   Some of them have thermal protection, some even have heaters in them.  I don’t fish in freezing weather so I don’t worry about it.

Also, I would not choose a LiFePO4 battery for a starting battery.   As I posted earlier, they can shutdown if you pull too many amps and they have been known to damage alternators because of the BMS switching.  A cheap lead acid makes a better starting bat. 

I have a small AGM battery in my boat for starting and only for starting.  Everything else runs on LiFePO4.   In a pinch a LiFePO4 could start my main, it’s only 60hp, but I would not leave it connected.

[CP]

As an added note, when you go to dispose of the  lithium battery, cheapest place I found  was  interstate battery, $5.00 a pound  for disposal, my Torqeedo lithium was 55 lbs, so $225.00 to get rid of it.

Snohomish County Transfer stations will take them for free.

[Bunny Thumper]

Tag

[spin05]

https://techwithtech.com/safe-temperatures-for-lithium-ion-batteries-ranges/

I appreciate the link. I googled it as well. Just looking for some real world experience.

I fish in eastern wa all winter not sure these will work. Also mixed results on using these as a cranking battery.

Your better off with one of these. i put one in my Wooldridge. Its a dual purpose battery and i run everything off 1.  Good down to -40 deg.

https://www.odysseybattery.com/products/odx-agm31m-battery-31m-pc2150st/

[CP]

Cold weather trollers:

https://www.amazon.com/Lithium-Battery-LiFePO4-Parallel-Road-Trip/dp/B0BGS16NF7/ref=asc_df_B09Z3N356Q?tag=bingshoppinga-20&linkCode=df0&hvadid=80401920009136&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=c&hvlocint=&hvlocphy=&hvtargid=pla-4584001437306672&th=1

$359.99 for 100Ah - That's the cheapest auto-heated LiFePO4 that I've ever seen.