Lithium 12 volt battery Is there a clear leader?

lithium pros has a tm series for solar also also a 5 yr warranty 3 year free replacement

MEXICOWANDERER wrote:
The brick wall I am running up against

Is the warranty

One Year ?!!!!!?

If these batteries are so damned good with thousands of cycles claimed and BMS to insure against mistreatment, 1% loss of charge per year, no need to maintain full charge, yadda k yadda k yadda...

Then why are they warrantied like chew & spit merchandise?

None of these gizmos have enough consumer-time to have gained a reputation.

If they were inexpensive I'd shine it on. BUT!

Only the top end lithium batteries way too big have credible warranties.

PTUI!

I don't always agree or understand your posts BUT I agree with you on this one !

Ron W.

The brick wall I am running up against

Is the warranty

One Year ?!!!!!?

If these batteries are so damned good with thousands of cycles claimed and BMS to insure against mistreatment, 1% loss of charge per year, no need to maintain full charge, yadda k yadda k yadda...

Then why are they warrantied like chew & spit merchandise?

None of these gizmos have enough consumer-time to have gained a reputation.

If they were inexpensive I'd shine it on. BUT!

Only the top end lithium batteries way too big have credible warranties.

PTUI!

I just replaced 9yo Duracell GC2 with a pair of Trojan T-105s. I did the research hoping to replace them with LiFePo4, but the cost was still a big stopper. At five-plus times the cost today and the actuarial tables that say that the Trojans will outlive me, it just did not hold any charm.

I really would have liked to lose that lead weight.

Matt

Advertisers seem to be treating F and C as interchangeable.

Literature I can find says -20c which backs up the -4F claim from Amazon

Haven't found anything lower but I'm not researching like I was writing a paper on the subject.

Try these keywords in the Google for some technical reading:

Lithium iron phosphate LFP operating temperature inurl: edu

The inurl keyword is important, it filters out all the .com trying to sell something. No space between : and e

What do you guys think of This?

They claim to be able to charge the battery at -4F which seems too good to be true.

Thank you Mr. Wizard. I obviously was thinking of a different battery which is an error on my part. Shunt regulation is how I regulate charge current limit in an equalization exercise so the practice is valid. Some thermal dissipation issues.

Sounds like a tiny Meanwell is a feasible charger. Maybe a <100 watt model. Rationale for tiny is weight.

Hi Mr.Wizard,

I've never seen an LI that would work at -20 f (-29 c). I wonder if someone made a mistake? I'm basing that on -20 c and -4 f.

these ar the specs for the battery i posted

SPECIFICATIONS: Dimensions: 5.94x2.55x3.74 in (151x65x95 mm). Weight: 2 lbs 14 oz (1.30 kg).
Capacity: 10 ampere hours.
Lifecycles: Up to 80% capacity for 2,000 cycles in recommended conditions. (Typical SLA has 400 cycles)
. Terminals: F2 terminals 0.25 in. wide (6.35mm)
Discharge: 15 A max continuous, 60 A max 2-second pulse. 9.2 V max discharge, 11 V max recommended discharge.
For longest lifetime recommended discharge rate 1-5 Amps. {three in parallel equal 15amps load and long life}
Charge: 10 A max, 14 V max recommended, 15 V max. Compatible with most SLA chargers.
Operating temperature: Min:-20 F (-29 C) Max:120 F (49 C) . Max recommended environmental operating much better than SLA or other lithium s.
Includes active BMS protection circuit for increased performance and longer life.
SKU:ADIB00JK06CK8

From what I've seen on the insides, they don't use a voltage "buckers". they just rely on narrow conductors, internal resistance and a limited charging supply.

When the cell hits Vmax a mosfet on the BMS bypasses it. That stresses the mosfet, which is why a user replaceable BMS would be nice, but it's not practical for a mass produced battery.