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these are lithium batteries so it does depend on the the batteries and bms used in the batteries as there is no baseline certified standard it seems. add to the fact that a applications and load vary from application to application.

Most likely yes, I agree. but some state otherwise to quote this company https://earthxbatteries.com/lithium-battery-series-parallel-operation-2/ "Maximum Safe Operating Limits When two batteries are put in parallel the continuous discharge amp rating and charge amp rating is typically...

How is that funny? Its a valid drawback unless the battery back is sized to output a much higher continuous amp output than the load ever reaches. If a person has 2 100ah batteries in parallel and one battery happens to trip the bms when say a 160 amp load is put on the pack even for a few...

There is one drawback of the parallel wiring.. And that is the reduction of capable current from the pack available to the load which can still cause a chain reaction of the bms all shutting down. If the load is never high enough to trip the remaining bms overcurrent protection then this doesnt...

So I'm just sharing a quoted post from a golf cart forum I belong to because i feel its relevant here. I was previously unaware of these differences between AGM and FLA. "AGM batteries in series have a similar problem to lithium when charging them, regardless of the charging profile. AGM do...

That is true when we are talking about lithium batteries with thier own bms wired in series baecause when one battery reches full charge the bms shuts off continuity to prevent over charging and then all the charging to the other batteries is stopped. lead acid chargers work differently as well...

Well if that was true which it may be that having the charger recycled would indeed help ensure the lagging batteries are given more charging time and it would improve "balance" The timer trick is used often with golf carts since those chargers work the same way now and the batteries start self...

That will work. and 50ah is plenty for the 480rm mower since it never draws 50amps (typically its below 30amps when mowing ) and a 50ah lifepo4 battery will give about the same runtime as a 100-125ah lead acid. I connect my charger directly to my pack and dont bother with the onboard port. I...

They were these packs wired in series but I got them at b hookup.... I cut the last cel off from the series but left it in the pack for compression reasons.... ends up being a 48v pack for under $500 shipped...

My 4 agm batteries still tested and worked fine even though they were 4 years old. I sold them for $50 to a guy who wanted them for a scooter. I could tell by the time I was finishing up my lawn though that they were nearing the point of needing a charge. The issue with the ryobie is it would...

I bought these same cells just about a year ago from the same globalpower... I did not test the capacity of the cells but I suspec they are likely the same around 74 as other reviews stated such. I had them in a golf cart and now they are in my riding mower with no issues. when I purchased mine...

But it does happen in many of those things... all factory second tires from a reputable manufacturer have "Blem" carved into the sidewall for this reason and a factory second cpu chip is still sold as a grade "A" chip its just underclocked and sold as a slower/cheaper model chip. With some...

What gets me is some go through all this effort and $$ buying the premium cells an then not even taking the time to compress them properly in the installation cutting the lifespan short anyway...

I'm in the states... all the new cells stateside im seeing are more than 10-20% more on average, especially when factoring in shipping. Ive bought from multiple stateside as well al ali vendors... All have been postive experiences. Ive yet to find the 86ah CATL cells I bought for about $35...

It is FAR more likely to happen on alibaba or aliexpress unless you do your homework and research the seller and feedback. I have well over 2000 ebay transactions according to my feedback which means likely over 4000 in reality and ive only been burned once there. amazon is very good about...

Exactly... people dont even agree on the US sellers being reputable..

So how many agreed on reputable venues are their through these channels?

Call it what you will... I cant see how the dealings through all the middle men can be anywhere near as efficient or fair?... Your still dealing with china.

How the hell are are you going to buy a chinese made product without dealing with china in some way?

Well its was the jag35 diy second life store that I got the warning from.

Well Ny helped pay for half of my 11kw solar array on my house 4 years ago... but im in western NY..

Came across this on the jag35 website... NEW YORK residents: On 3/2/2023 New York passed a law banning the sale of lithium-ion batteries for mobility devices that are not certified to UL 2271, and the assembly and reconditioning with cells removed from used batteries for commercial sale within...

batteryhookup has the new style cells here cheap.. https://batteryhookup.com/products/4-new-eve-3-2v-280ah-lk280k-lifepo4-prismatic

With that many failures I am questioning how this actually happened. It would seem something caused these failures on ALL 3 of the batteries and I doubt its because they were all defective. There has to be some non typical variable here they were subject to to take out all 3 so quickly.. EDIT...

There is no implemented standard for grades of batteries though. This as been discussed and beaten to death. Its a made up thing sellers use to market battery cells and subject to the imagination of the seller. Theres the batteries that pass all the criteria testing for EV's and then theres all...

How are you reconfiguring the terminals? do you have a laser welder?

Big Battery recently broke up with their manufacturer (Battery EVO) The specs big battery were using seem to be inflated from the actual manufacturers specs on the same batteries they also sell under thier own brand... They even recommend and sell the wrong voltage charger (58.8v) to go with...

Curious/ whats the weight difference between a legit 304 cell and a 280? do you know?

I went with aliexpress 90ah lifepo cells fo my last 16s build... works great but im building a 72v pack now made of bmw/fiat packs (64ah samsumg nmc cells) I put the 16s lifepo pack in my ryobi riding mower..

Hes building a golf cart pack. Most commercial golf cart packs are 175a or more continuous discharge and are 105ah or less.. a 105ah pack is normally good for 30-40miles. the performance carts sometimes need more with the 500-600amp controllers and high torque motors. many use the 300/600amp...

if you wait long enough you can score great deals on used but tested cells at batteryhookup.com If purchased different cells there a few times and all have performed like new.

According to pics on the 18650 store theres both round like pictured here and the hexagon cells out there..

Were these properly compressed when in use? from the looks of the bottom of that one cell you just had the raw cells bouncing around in the rv? they really need to be encased with proper compression to prevent bloating and damage to the thin aluminum cases, more so in mobile applications. (Not...

Mine will pull about 155amps for 1 second if I floor it at a stop. not sure yet how much that will be effected when going to 72v.

The specs on most golf cart lithium batteries are actually higher than 100amps... Most 36 of 48v packs that are meant to be run individually output at least 150amps continuous and much more peak.. A lot of folks in the golf cart forums like buggies unlimited unknowingly buy 4 12v solar storage...