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It's a little annoying how well these cheap welders work considering the time, effort and money I put into mine...but I digress. Preheat is a brief pulse that helps to burn off contaminates and oxides prior to the main weld pulse. Edit: Hang on... They've upgraded that BMS. Two additional...

That's awesome! Looking forward to the build pics.

Looking at the evidence in this thread, that's exactly what they did.

The best thing you can do if you buy a knock-off battery is crack it open and check the internals before connecting it to a tool or a charger. If you don't see a proper management board and decent cells, send it back.

I'll share the lesson I learned about 12" sliding miter saws: They're gigantic. I should have kept my handy little 10" chop saw and not worried about the 1% of cuts I had to do with my circular saw.

I just saw those for the first time earlier tonight. The build quality and BMS are not great. It's too bad, because the cells they're using are pretty good.

Those were the universal battery system Ceenr makes. These are different.

Anyone want to order a set of these and crack them open? I've done my part for the advancement of LXT battery technology. https://ceenr.com/product/8ah-battery-for-makita-18v-replacement-model-bl1860b-2-pack/ Edit: Never mind, I found a picture of the internals and it isn't good. It's a...

Tool companies will never stop turning the screws on battery prices. What they're going to do is spawn a market for good knock-off batteries with proper BMS and build quality on par with genuine batteries.

The cells have probably failed and developed internal shorts. When they charger puts a voltage across it, there's no drop, so it thinks it's seeing a full battery.

Makita batteries have a sophisticated BMS that handles cell balancing internally. That doesn't excuse current prices, though. They're trying to push LXT owners toward XGT. As a Makita fan, it's disappointing.

You're serious?

You can't identify the benefits of nails/pins over screws when it comes to installing trim?

Why are you asking? Last I heard from you there was no reason to buy anything but Snap-On.

This one should do the trick: https://www.amazon.com/Jesverty-Variable-Switching-Quick-Charge-Adjustment/dp/B0DDPVDWPZ?tag=atomicindus08-20 You might see cheaper units, but don't buy anything that doesn't have a button to enable the output.

First step is to remove the case and check the voltage of each group of parallel cells. I'm not 100% sure how to do that on a battery that can reconfigure itself, though. Once you figure out which groups are low, you need to charge them slowly with a bench power supply. Do NOT try to charge...

Respectfully, you don't know anything about this. The mosfets that carry all of the battery current (rather than just switching an auxiliary terminal for tool communication) are three CRTM030N04Ls that are rated for 80A continuous/116A peak. Each. The BMS has essentially nothing to do with how...

More accurately, CEM made/makes both.

...and? Klein and Brymen both make professional grade meters. Brymen'a high end competes directly with Fluke.

No, I couldn't have added an extra layer. The pack just barely fit in the case the way I built it, with the strips welded as flat as possible. My strips are 0.15x8mm. I did the math on the resistance of the steel between the batteries and the nickel. It comes out to 0.00019 Ohms. Multiplied...