Lithium lifepo 100 amp batteries?

[Dutch]

Research has shown me prices from $200-$800.  I am in the dark here.  Do any of you have lithium knowledge?

[Seth]

I've been running a pair of 100ah AmpereTime (now LiTime) to power my 24v 80# MK Ultrex for a few years now and they have been great. The days of a weak trolling motor at the end of a long day of fishing are gone. The biggest drawback with the cheaper batteries is that you can't charge them in below freezing temps. The more expensive batteries usually have a battery warm or low temp protection built in to avoid damaging them. They are light enough that it's not a big deal for me to pull them from the boat, bring them in doors, and charge them with a cheap lithium compatible charger than I bought off of Amazon. For most fun fishing trips, I can go multiple days without worrying about charging them anyways.

[Dutch]

Temp isn’t a problem.  My garage is heavily insulated and stays above 50°.  I just want information so that I can make a good decision about what to get.

[aarchdale@coresleep.com]

I got a couple Chins 100amp lithiums off amazon a little over a year ago, i think around $750 including a new charger. So far they have been great. I used to pull cranks for walleye at Bull a lot and the old lead batteries would only last around 4 hours even when new.   The Lithiums are still chugging along after a solid 6 hours. Had a buddy get the same ones and he went from a 36v lead acid system to 24v and he is happy as can be.   I guess time will tell if they last the 7-10 years they say.   Ill be more than happy if they last 5

Like seth said they wont charge when its really cold but its not been an issue for me I charge them when i get home and its usually above 32 at that time or i wouldnt have went to begin with.   Id say your good in your nice shop and garage

 

Lots of cheaper options have came out in the last year and most the stuff i read on the BBC forums is all positive. Funny people talk about their warranty all the time with the expensive USA ones and how quick the companies swap them out for them

https://www.amazon.com/CHINS-Rechargeable-Parallel-Road-Trip-Wireless/dp/B09F9M82VN/ref=sr_1_3?crid=3MUNJ5PREUYJ7&keywords=chins%2B100ah%2Blifepo4%2Bbattery&qid=1704492103&sprefix=chins%2Caps%2C549&sr=8-3&ufe=app_do%3Aamzn1.fos.f5122f16-c3e8-4386-bf32-63e904010ad0&th=1 

 

[MrGiggles]

They're not all the same. Many brands have been disassembled and tested by Youtubers, do some research before you buy. 

I have Valence (used batteries salvaged from medical equipment) lithiums. A buddy has Ionics and likes them. 

I think prices have fallen enough now that it's a pretty easy decision. Huge weight savings, way longer lifespan, more capacity (can discharge them nearly 100%,) and pretty much no drop in performance as they discharge.

[snagged in outlet 3]

So what all do I need for a 80# 24 volt ultrex?   2 batteries and a charger?   

[Dutch]

57 minutes ago, snagged in outlet 3 said:

So what all do I need for a 80# 24 volt ultrex?   2 batteries and a charger?   

You can get 24 volt lithiums.

[Dutch]

I’m pretty sure that I need to replace my house batteries soon.  That is why I am researching and asking questions about lithium batteries.

[MrGiggles]

In addition to those Valence lithiums for the trolling motor, I have a 12ah Wieze(?) lithium for front graphs and electronics. Aside from being a touch small for longer trips, it's been in there for a couple years now and still works well. I have a Noco charger that takes care of all three. 

I've got two of those Valence batteries sitting on the shelf, at some point in the future I may use one of them as a house/electronics battery, but it would require some pretty extensive rewiring so it's not a priority right now.

[Seth]

On 1/5/2024 at 7:48 PM, Dutch said:

You can get 24 volt lithiums.

I'd still run a pair of 24v or 36v wired in parallel for redundancy. If one fails, you're not dead in the water or running to Walmart for new batteries. If you're running 12v, you can still swap in a 12v lead battery to get you by.