General > General Technical Chat

USB-C charging law in the EU.

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Siwastaja:

--- Quote from: wraper on November 11, 2023, 08:53:14 am ---Word charging port means it's used for charging. If device has no charging capability this law does not apply. Also this is a press release, look into actual document where it's explicitly said handheld videogame consoles. All the fuss over refusing to understand what it's all about.

--- End quote ---

Why look at the actual documents when you can speculate based on completely made-up assumptions until cows come home? People love spewing bullshit like this. Just like the lightbulb lifetime conspiracy stuff when lightbulbs were still relevant. Me, I never understood this thing; there are so many real problems everywhere that I can discuss that I don't need to make them up.

AVGresponding:

--- Quote from: CJay on November 11, 2023, 11:54:07 am ---
--- Quote from: AVGresponding on November 11, 2023, 10:50:38 am ---
Any modern real power tool with a fast charger. Personal example would be my DeWalt fast charger that does an 18V 5.0Ah battery in 20 minutes. Then there's the DeWalt FlexVolt, not sure what the charge power is on those but it's going to be more than 240W. Pretty sure all the main manufacturers have a fast charger for their pro/pro-sumer grade tools.

--- End quote ---

The highest current Dewalt charger have is the XR12A, that's 12 Amps at 18V which can charge a 9AH battery in 45 minutes so that would seem roughly analogous to your 5AH battery in 20 mins.

However, a quick cig packet calculation will tell you that 12 amps at 18V is 216W and, if you actually read the spec sheet of the charger,  it only charges to 80% in that 45/20 minutes, a full charge will take a lot longer.

For your reference and to help you not look silly in future, the power formula:

P=VI

--- End quote ---

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

Though I will concede my charger does a 2.0Ah battery in 20 minutes, not a 5.0, that takes over an hour... d'Oh!  :palm:   :-DD

Still makes no difference to the fact that usb-c is far too fragile to be of any use on a building site.

Monkeh:

--- Quote from: CJay on November 11, 2023, 11:54:07 am ---However, a quick cig packet calculation will tell you that 12 amps at 18V is 216W

--- End quote ---

To help you not look silly in the future, that's 216W output, at 3V below the full charge voltage. To achieve that into the cells from a USB-C supply, you'll almost certainly exceed 240W. You'll also be duplicating all the charger circuitry in the pack as well as in the dedicated chargers (which people will want to use 99% of the time, because they're vastly more rugged, secure the pack, take multiple packs..).

Power tools do not need or want USB-C ports on them.

AVGresponding:

--- Quote from: NiHaoMike on November 11, 2023, 12:28:08 pm ---
--- Quote from: AVGresponding on November 11, 2023, 10:50:38 am ---This is besides the point in any case, as these things are just too flimsy to survive more than a few days on any construction site I've ever worked on.

--- End quote ---
Note how I mentioned that IP65 or greater should be exempt, ruggedize it to at least that level and it wouldn't be required to have USB-C charging. That still leaves how to standardize the ones that do go that route, I suppose Qi charging would make sense for the smaller ones. For the bigger ones, some sort of standardized rugged connector would be the way to go.

--- End quote ---

Don't think I've seen any chargers or batteries with an IP rating that high, though I suppose there probably are some in specialised use cases. The requirements for ruggedness tend to be from a physical impact POV, and to some degree a tolerance for dust.

tooki:

--- Quote from: NiHaoMike on November 11, 2023, 01:28:42 am ---
--- Quote from: AVGresponding on November 10, 2023, 02:45:05 pm ---No, just no. The power output of usb-c isn't up to the job in any case, for the bigger batteries and the requirement for fast charging, but apart from that, keep shitty, fragile consumer crap out of my workplace, thank you very much. Also that would require impractical increases of size for batteries or tools. No.

--- End quote ---
What power tool charger you have that's greater than 240W? Only ones I can think of are the ones for cordless mowers, but that's already big enough for an IEC mains input to make sense. (And the ability to run either corded or cordless would be nice for the majority of cases where a large part of the lawn is easily within reach of an outlet using a reasonable length extension cord, but part of it is not.)

--- End quote ---
FWIW, I found this one on Hilti’s website: https://www.hilti.com/c/CLS_CORDLESS_TOOLS_7123/CLS_CORDLESS_BATT_CHARGE_7123/CLS_CORDLESS_CHARGERS_7123/r13275404

450W output power, for a single battery pack!

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