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1.118 milliohms?! Per cell? That’s really not good. They should be under 0.25 milliohms per datasheet but knowing we are all getting Grade B I’d be ok with 0.50 at a good price.

So I bought two 12V 100Ah batteries to replace the AGM's that just never lasted long enough. Always needed to be recharged by the generator. Unfortunately the camper was stored somewhere I couldn't easily access it. Then my dad bought a storage unit for RV's and cars and shit so I have a nice...

Did you ever make a decision on ordering 8 more cells? I was going to go 24V because my first set of batteries is a bunch of NMC I haven't arranged in series yet. The more time I thought about it, the more I realized I was going to go LiFePo4 as soon as the housing market crashes and I can...

That would be for the standard model that contains prismatic cells and is quite a bit larger and a little bit heavier.

I haven't spent too much time with it but this is a good reminder to go check it right now. Were you testing your cells at 40A? I have a few 12V A123 packs that are chopped up segments of the 12S electric bus packs and I was using one of those for testing it. When I attempted to go over 32/33A...

I was a bit skeptical of the seller but they are very communicative and seem to be a division of PowerQueen. No clue why its PowerQueen EU shipping from California A quick look on Ebay shows this beats the price of LiTime and Redodo Mini 100Ah batteries. So as of right now I believe this is the...

Then I used these Hirschmann style banana plugs (knockoffs but quality is good). I had to use a drill bit and carefully remove some of the rubber inside the banana plug insulation so I could fit 12 AWG silicone insulated wire (BNTechGo from Amazon is what I usually get. Not always the cheapest...

If you're up for the DIY option there have been a bunch of A123 modules on Fleabay. Seller is guaranteeing 90% capacity and I'll just say I'm skeptical but won't know until I get the pack that I decided to try as a test order. I think most of them have been purchased. Make a "best offer" of $90...

Any cell that has degraded more than 20% of its rated capacity will likely be on the rising steeply part of the IR/life cycle curve. Once it hits 40% degradation you’ve pretty much guaranteed that DC IR has dramatically increased and the cells continuous discharge rating can no longer be...

Just want to double check, are the PowerQueen threads M8-1.25? Gotta buy a longer one because of this rats nest. Adding a thick lug.

A bit of a necro revive but AFAIK there aren't any panel mount options but there are several buck boost boards, and the smallest one I own is 47x32mm and 13mm tall at the caps IP2368 mini also called IP2368 pro (two different designed boards are out there, size specs are similar but the one I...

I work for a company that salvages lithium cells from batteries and we recently got some CALB CA100's. Capacity testing is all over the place from pretty much 0 to 99Ah. Weird thing is all the cells were near nominal voltage when removed from packs and while I know the YR meters can't read sub...

Are these new? I prowl Ali for new capacity testers often and just recently saw these

Necrorevive but I am so glad I saw this. Cannot believe how cheap18650BS was with you throughout this debacle. Are they unable to do the claim as in does UPS ONLY allow the recipient to process the damaged package claim? They should have a UPS rep they can call/have physically come in to resolve...

Might be interested in AC and DC switchgear if you part

Bit of a necro revive but here's the answer: So the whole purpose of looking at the server power supply route is $$$. You can get the 900W/1200W HP DPS units for $20 all day on eBay and I have been buying the 460W PD28 models for $8 each. For supplying one of the bigger lipo balance chargers...

I just now realized it’s only the left screw on the PL28 that has contact with the DC board. Is the right screw just there for stabilizing the board? I do see a pad on the bottom but that’s the AC board (I think) and then there are pins on both sides that connect the lower (AC) board to the DC...

Thanks. Same cells I am looking at. Love how Varicore/LiitoKala has to lie and call them 25Ah cells when they are 22. How accurate is the 5C continuous rating. For example A123 is a little optimistic in their claims of 50A continuous. I find 20A to be a good middle ground to run them at and...

you can download the Google Chrome app on your phone. Part of the image search feature is the ability to translate text on screen to your chosen the language. Here’s what I got, it missed a couple parts but doing it in person allows you to change the angle of your phone so it can better read the...

I bought these Headways off FleaBay a while back. The seller was selling them in groups of 2, 4, 8, 16, and 32. I put a bid in on an 8 pack at 3am one night and a week later I saw that I won something I barely remembered bidding on. Despite the old date code I thought I had done pretty well...

I have had terrible luck with anything that has the SW2303 The SW3518S is the buck option I prefer but I don't think it'll work on a 48V system. Pretty sure anything on the market right now would require you step down the voltage. I bought the 4 channel version just because it looked cool but I...

They are a little under 50 cents a cell for the M1A if you buy a decent quantity https://www.batteryclearinghouse.com/products/a123-26650-lfp-38-4v-96-cell-rack-style-lifep04-pack?variant=39671480254542

Max charging voltage is 4.2V per cell. I’m sure someone will get all bent out of shape about that one sentence. It is the true max safe charging voltage just like most lithium ion chemistries but common sense will tell you that past 3.35V you start to see the voltage climb rapidly and if your...

https://www.aliexpress.us/item/3256805670722767.html?spm=a2g0o.detail.1000014.3.70adxuW6xuW6Zd&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.40000.326746.0&scm_id=1007.40000.326746.0&scm-url=1007.40000.326746.0&pvid=de4b2180-7ebf-4cf3-bf1d-c13678892c96&_t=gps-id:pcDetailBottomMoreOtherSeller,scm-...

For anyone wondering the middle 12V pack does indeed fit. I was not happy about taking that much nickel off but the pack is going to have quite a tight fit once I switch to expo y resin board and some kind of space filler for the long wall (pack is about half an inch skinnier than the can)...

There are simple relay modules that you can set up to turn a device on and off when a voltage point is hit. You'd have voltage sensing wires from the battery going to the input of the module and then you'd set the module to turn on 12.6V and then turn off at 14.0V The problem is the size of...

A human BMS has a 100% failure rate? So the packs made in the early days of LiFeP04 for RV's that had no BMS and are just now being taken out of service in some cases (usually to upgrade to 304's or something similar) that never had a BMS on them and survived a decade or so are...

Quite the contradiction....in such a short span of time.

Are Sriko's LTO cells Grade B? I've been on a binge of power cells lately and the Plannanos look quite impressive...if I could find 26Ah Lishen LTO's I would absolutely go that route. The Toshiba SCiBs just....seem like the C ratings are RC Lipo level BS. 75C 10Ah prismatic cells? 35C 20Ah...

The fact that they are in tool packs tells me that they likely have a discharge rate of 15A or higher. The packs seem to be well made and "should" support a discharge rate beyond the typical 0.5C rate powerwall builders limit themselves to when using laptop cells that are the human equivalent of...