USB-C

[RoamingKat]

I am trying to figure out what amps these ciggy style usb-c chargers draw from the batteries.
The output side says 65watts.       So, does that mean it is drawing 5.5 amps regardless of the voltage on the output side?

[Blacktank]

not sure but just having my 12v laptop charge plugged in draws some electricity

[sternwake]

It is capable of 65 watts output

USB C devices themselves, decide how much of that 65 watts of potential output, that they want.

I am not really on top of USB C, but apparently it is dual voltage capable, 5 volts or 9 volts, and only the devices that allow for 9 volts input, will ever exceed about 15 watts output.

There is some conversion losses involved, but they are likely less than a watt.

USB C cables themselves have some circuitry in the regular USB side, whereas older USB cables are devoid of this.

My new phone has USB-c and I bought some extra cables, and some allow the phone to charge much faster than others, on some USB sources and other times seems to make no difference and it does not depend on the phones level of charge. Sometimes max is 1.61 amps, other times 1.4, other times 1.1 amps max.

If you need to know:
'USB Multimeter Voltage Current Tester with Bluetooth Type-C PD Ammeter Detector'

https://www.ebay.com/itm/174700186680?ha...SwVT5gWWMQ

[RoamingKat]

Apple tells me that the usb-c that I must use for my Mac is 30w min. They provide a usb-c for the Mac…but it is a wall outlet style.

So, it makes no sense to me to use the inverter to go from 12v to 110v and then use a converter (usb-c ciggy style) to go from 110 to 9v to 20v. So this ciggy style I bought does lightning at 30w or 65w

So the max draw on my batteries would be the max draw of the charger. I would think it is safe to think the Mac isn’t going to draw more than that since that is the max output of the charger apple supplies.

[Wayne49]

I think that due to heat in the 12VDC converter, the conversion unit shuts charging off to cool down periodically. My laptop on 12VDC switches between charging and discharging a few times before reaching 100%.

I haven't seen that behavior with AC charging.

[Scott7022]

I may get called a MAC Fanboy but that doesn’t mean I won’t say some of their stuff is stupid.

The issue with some of the newer macs is if they don’t see the correct amount of current they won’t flip to charge. I haven’t checked the values past shit this wallcharger won’t charge the thing. They’ve had the same issue with external battery banks for a long time. So they invented PD power delivery. But now they have bigger draw processors machines, 100watts, I’ve never seen anything over 80watts usage CPU and GPU (highend) maxed but...

Sometimes the more you try to make a smart device you end up making it stupid. I just plug mine into the built in 110 plug and let it charge as I drive. 7hrs of runtime is more than enough screen time for any day.


Sent from my iPhone using Tapatalk

[RoamingKat]

Well…if I get a small 300w inverter, do you think that will do the trick?

[rvpopeye]

12v DC charging and 120v AC charging can be confusing amps wise but watts is watts.

TypeC chargers (both DC and AC ) that can actually produce the current for some of the larger (tablets and bigger CPU phones)of the C devices are rare (I've been looking...) be careful on the labeling some are rated X# of amps but have more than one output , each of which are NOT rated for the charger total watts , that's the total of all outputs.
This applies to the power bricks too. Some devices are needing more than the typical 5v to charge too , Quick Charge devices play this game.

Using an inverter powering an AC charger is up to how many watts the charger needs.
Look on the charger label to find out.
Allow a little extra , you'll want to charge other things and it's good to not run these things at max output..

My 700w inverter is enough for a few chargers at the same time so guessing that 300w would be enough for one .
Some devices are a bit strained on a MSW inverter , cost more but PSW is ,,, cleaner power.
(If the "brick" gets hotter than it did on house power is a hint is isn't happy and may release the magic smoke in time. But it's just a hint , might just stop working .....or it might work just fine , roll the dice ? )

Makes MY head spin keeping track of all this crap .
It took many years for the pro audio industry to get any sort of standardization going for wiring instead of many brands going their own (of course superior) paths ,much better these days but still some holdouts ..see parallels in this evolving device charging thing... I "think" it's all getting better ,,,well sorta.

[RoamingKat]

Now that EU requires all devices to be usb-c, I am sure that apple (etc) will standardize on that. Would make so sense to produce different devices for different markets.

[rvpopeye]

If it doesn't make sense ,,, they will probably do it.