When evaluating the two different battery types (i.e. Lead acid vs LiFePo4), I found this ‘to the point’ summary to be both informed and helpful...https://www.power-sonic.com/blog/lithium-vs-lead-acid-batteries/3 tons

I would not agree with some of what they say there but for Each there own.

That appears to be a fairly reasonable comparison, although they don't mention cost. The nice thing is Power Sonic sells both, so maybe there is less baked in marketing BS.

In this paper they claim the LFP charges four times faster than the SLA and show how that is done.https://www.power-sonic.com/wp-content/uploads/2019/04/How-to-charge-LiFePO4-batteries.pdfIn the SLA graph it shows 25% charging rate and in the LFP graph they use a 40% charging rate. They then say the Bulk Stage using those rates takes four hours with the SLA and one hour with the LFP.Beats me how 40% is four times 25%. Usually the story is the Bulk Stage is shorter, ending at a lower SOC with SLA., so the LFP is faster for the time it stays at full constant amps while the SLA is tapering amps in the Absorption Stage. Or they say you can use 1C vs .25C to get the four times for the Bulk Stage. How do they get four times with .40C vs .25C?Can anybody please explain? What am I missing?

The difference is the LiFePO4 stays in bulk charge at the full charge rate (be it 0.4C or 2C) up until it is almost fully charged. LiFePO4 only takes 15 min to an hour in 'absorb' to reach 100%. Lead acid requires several hours in the absorb phase to get the last 10 - 20% of charge into the battery. It is also important to get lead acid back to 100% as often as possible, so waiting those hours for the absorb to finish is important. LiFePO4 doesn't care about being charged back to 100%, so if you are OK with just going back to say 95% SOC, then you don't need the absorb phase at all. On a related note - folks often claim that the care and feeding of lithium is more complicated than lead acid. This illustrates that this is not the case, lead acid requires a 3 (or 4 stage) charge profile, whereas lithium is fine with 1 stage, and ideal with 2 stage.

LiFePo4 vs Lead Acid...Some points of interest.

jaycocreek
Explorer II
Jan 08, 2022
2oldman wrote:
JKJavelin wrote:
Still, a lithium battery with a BMS for under $300. Too good to be true?
You won't know until a couple years later.

Or you can pick one of the batteries Will P has torn down and compared that are in that price range..Other than the cold cut off,Will has recommended or commented that Ampere Time/Chins and Zooms are identical batteries internally except for the name on the case..Same BMS/cells and quality connections etc inside...

I think the Chins and Zooms are both under $320 last time I looked...

Jayco
2oldman
Explorer II
Jan 08, 2022
JKJavelin wrote:
Still, a lithium battery with a BMS for under $300. Too good to be true?
You won't know until a couple years later.
JKJavelin
Explorer III
Jan 08, 2022
time2roll wrote:
OK to delete the tracking, marketing referral and search data after the item number...

https://www.amazon.com/Lithium-LiFePO4-Battery-Perfect-Trolling/dp/B09N6Q9ML9

Wow!
This company is Energy Lions.
Easy to confuse with the more established Lion Energy. Even the lion head emblem is similar.
Still, a lithium battery with a BMS for under $300. Too good to be true?
jaycocreek
Explorer II
Jan 08, 2022
3 tons wrote:
Returning to the topic, a quick re-check at amazon, dropping prices suggest that for some folks FLA’s might soon be getting kinda hard to justify - though I cannot personally attest to amazon’s LFP offerings…

3 tons

I tried one of there sub $350 100ah lifepo4 batteries and got 104ah out of it...it seems to have a weird voltage curve but in the end,it delivers what was promised..I'm quite happy with it and have been using it 24/7 with a compressor fridge..

It seems these new lifepo4 battery makers have little price wars on Amazon which is a good Time to make the leap if so inclined.. IMHO...

Jayco
3_tons
Explorer III
Jan 08, 2022
time2roll wrote:
OK to delete the tracking, marketing referral and search data after the item number...

https://www.amazon.com/Lithium-LiFePO4-Battery-Perfect-Trolling/dp/B09N6Q9ML9

Many thanks :)

3 tons
time2roll
Nomad
Jan 08, 2022
OK to delete the tracking, marketing referral and search data after the item number...

https://www.amazon.com/Lithium-LiFePO4-Battery-Perfect-Trolling/dp/B09N6Q9ML9
Itinerant1
Explorer
Jan 08, 2022
Wow, they almost look like Lion Energy batteries. I wonder if the price is to good to be true.
fj12ryder
Explorer III
Jan 08, 2022
Grit dog wrote:
fj12ryder wrote:
2oldman wrote:
Posts with constant misspellings are distracting. Can't you find a spell-checker off line and compose there first? Facebook has it and likely your email.
I usually decide they aren't worth the effort and pass them by. Life's too short.

If you two literally are bothered by this, trust me when I say that the problem is not him. It’s you.
Well, it you're bothered by what bothers us, "trust me when I say that the problem is not him. It’s you." :)
3_tons
Explorer III
Jan 08, 2022
Returning to the topic, a quick re-check at amazon, dropping prices suggest that for some folks FLA’s might soon be getting kinda hard to justify - though I cannot personally attest to amazon’s LFP offerings…

3 tons
Grit_dog
Navigator
Jan 06, 2022
fj12ryder wrote:
2oldman wrote:
Posts with constant misspellings are distracting. Can't you find a spell-checker off line and compose there first? Facebook has it and likely your email.
I usually decide they aren't worth the effort and pass them by. Life's too short.

If you two literally are bothered by this, trust me when I say that the problem is not him. It’s you.