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USB-C charging law in the EU.

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Siwastaja:

--- Quote from: AVGresponding on November 11, 2023, 12:39:20 pm ---So that you don't look silly, maybe you should consider the full voltage required, not the nominal voltage. Due to reverse protection etc etc this is on the order of 21.3 volts. 21.3x12=255.6
--- End quote ---

Your point is perfectly valid without going into such details you get all wrong and make yourself appear more stupid than you actually are.Having designed a few, I can confidently say that high-power chargers can not afford significant voltage drop (i.e., series diode), and also quick charging is something you can only do to a relatively empty li-ion cell, because already above 70% SoC or so the rate of lithium plating on the anode is a problem at high charging current. This is also why EVs start to throttle down fast charging from as early as 60%; your power tool charger most definitely does that, too, and the 20-minute time clearly is not from 0% to 100%.

As all high-power chargers would be efficient synchronous buck converters - something like 97% is easily achievable, and actually economically viable because wasted power means heatsinking and larger device -, output current available to empty battery pack is higher than the maximum input power cable current rating suggests.

... not by much, though; it just happens that your numbers you used trying to prove something are wrong by just that small margin - just barely. But quite obviously, if you look hard enough you will surely find a power tool which supports even higher charging current. What you are saying is obvious to everyone.

And indeed, no one is forcing USB-C on your beloved power tools, this is obvious. You creating a strawman from NiHaoMike's random remark and fighting against it is utter waste of time.

PlainName:

--- Quote from: AVGresponding on November 11, 2023, 12:39:20 pm --- the fact that usb-c is far too fragile to be of any use on a building site.

--- End quote ---

Not sure I follow how USB has to be on a building site. Rechargeable drills and the like use plug-in battery packs, don't they? And those battery packs are charged from chargers that plug into mains (or, more properly, site mains). AFAIA, 'portable' applies to the drill and not the charger or batteries, so how is USB-C mandated for them?

wraper:

--- Quote from: PlainName on November 11, 2023, 06:46:07 pm ---
--- Quote from: AVGresponding on November 11, 2023, 12:39:20 pm --- the fact that usb-c is far too fragile to be of any use on a building site.

--- End quote ---

Not sure I follow how USB has to be on a building site. Rechargeable drills and the like use plug-in battery packs, don't they? And those battery packs are charged from chargers that plug into mains (or, more properly, site mains). AFAIA, 'portable' applies to the drill and not the charger or batteries, so how is USB-C mandated for them?

--- End quote ---
Neither law has anything to do with power tools, nor they have charging port to begin will. A lot of fuss about irrelevant nonsense.

xrunner:

--- Quote from: PlainName on November 11, 2023, 06:46:07 pm ---Not sure I follow how USB has to be on a building site. Rechargeable drills and the like use plug-in battery packs, don't they? And those battery packs are charged from chargers that plug into mains (or, more properly, site mains). AFAIA, 'portable' applies to the drill and not the charger or batteries, so how is USB-C mandated for them?

--- End quote ---

I have a battery powered screwdriver with a removable battery. It (the battery) has a USB C charging port built into it (the battery itself). So it can be charged from from a battery bank which has USB C power delivery and not necessarily a mains powered USB C power delivery charger, good if no mains power is available.

xrunner:
PlainName - I saw your post but you deleted it while I was writing a response ...

Why did you pick Makita tools for an example of batteries that can't be charged with USB?

Dewalt tools has an adapter that you can attach to your Dewalt battery, and it allows it to be charged via a USB C power delivery charger or battery bank. And it is also bi-directional.  :-+

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