laptop navigation

I use my iPad 4 which has built in GPS with Navionics and iNavX both now accept AIS from my transceiver I prefer iNavX because the Navionics AIS targets are rather large can hide chart details. I mount my iPad on the cover of my Raymarine C120 plotter under the spray hood, I have a cigar lighter close by so my iPad is connected to boat 12v not sure I would want anything different I use my iPhone for anchor watch plugged in and on my pillow , I don’t like sleeping with my hearing aids in,But as my new hearing aids now connect to my IPhone with Bluetooth I certainly wouldn’t sleep through an alarm.
Mike
 
ryanroberts said:
On chargers, can't seem to find DC compatible USB-C outlets anywhere yet. Almost everything is moving to USB-C for power and data, even for pretty high draw (the new macbook pro takes up to 96W over USB-C)
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I've used three different Belkin 12v adaptors with two different MacBooks, a 2016 13" and 2018 Macbook Air:
I can't say I've noticed the 27W as charging faster, but I don't recall that I've tested them side-by-side either. If the laptop is left plugged in whilst sleeping, then the 27W needs to be unplugged and plugged back in at both ends, after it wakes, to resume charging. The 15W with the fixed cable can be damaged with a careless sideways tug with enough weight behind it, requiring replacement of the whole thing, but these were my staple for a long time and I still have two of them. A year or so ago John Lewis were half the price of Amazon.

I have finished writing this and realised that you wrote outlet not adaptor; nevertheless I shall hit save hoping someone else finds these remarks helpful.

I also use two 26800mAh Charmast USB-C power banks, which can each run my Macbook for 4+ hours - this is the model I have, but this one appears to be slightly better value on a mAh basis. Always search Amazon for "Charmast" because the same model is available under different part numbers at different prices. Anker is another popular brand, I think they're slightly more expensive.

Do NOT charge a Macbook through a cheap USB-C hub! This mistake fried mine!

I would have no hesitation with charging a 96W Macbook Pro with any of these chargers - USB-C can negotiate how much is supplied; the charger supplies as much as it can, and the laptop doesn't try to exceed it. I think my Macbook is about 40W or 45W (or the last one was) and it's fine with the 15W Belkin charger - if I hammer it with things like Photoshop whilst it's plugged in, the laptop's internal battery will fall from 100% then stay around 90% or 95% for hours, as the supply and draw averaged out.

USB-C on my Macbook is fantastic, a stark contrast with my cheap Windows tablet which runs off a micro USB cable - the supply cannot keep up with the tablet's draw, and it takes hours to recharge.
 
KompetentKrew said:
I've used three different Belkin 12v adaptors with two different MacBooks, a 2016 13" and 2018 Macbook Air:
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This ain't enough. A USB-C power delivery charger should go up to 5 amp at 20 volts - 100 watts. These will not drive my laptop and charge the battery at the same time. The one I listed above will. I have tried many on my path to a solution. NB the standard only requires cables to be good for 3 amps, but allows 5, so you need the right cable too. It is very confusing (if you are as stupid as me). I made a number of useless buys before finding a solution. I don't believe even the one I found goes to 100 watts - just 60.
 
Amulet said:
This ain't enough. A USB-C power delivery charger should go up to 5 amp at 20 volts - 100 watts. These will not drive my laptop and charge the battery at the same time. The one I listed above will. I have tried many on my path to a solution. NB the standard only requires cables to be good for 3 amps, but allows 5, so you need the right cable too. It is very confusing (if you are as stupid as me). I made a number of useless buys before finding a solution. I don't believe even the one I found goes to 100 watts - just 60.
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As I said in my comment, they would not be enough for my laptop either, if I ran it with the CPU constantly maxed out. But in reality few people do that and MacBooks are very efficient at drawing less power when their CPU is under-utilised, so 15W is usually enough to charge my MacBook (slowly) even whilst I'm using it. Even with heavy use, 15W is enough to keep it constantly above 90%+ of charge through hours of use.

If you refer to the Sandberg one you linked before, that's not USB-C - I find that the "QC 3.0" referred to is "a proprietary fast charging protocol developed by Qualcomm [which] works over existing USB 2.0 connectors and cables, and delivers a peak of 18W power". You can see for yourself from the specification on the Sandberg page, by multiplying the volts and amps together, that it can only give a max of about 18W or 19W, so the MacBook Pro user would be better off with the 27W Belkin (looks like Belkin now do a 30W one).

I have never seen a 100W USB-C car charger. USB-C PD can negotiate, and chargers have a lot of flexibility about how much power they supply.

I'm surprised MacBooks work with Qualcomm's proprietary Quick Charge 3, but no doubt you've tested it. Or could you be referring to a different model of laptop? My googling suggests that QC 3 only works with Qualcomm processors, but QC 4 is Power-Delivery compatible; yet your Sandberg is stated to be QC 3.
 
KompetentKrew said:
As I said in my comment, they would not be enough for my laptop either, if I ran it with the CPU constantly maxed out. But in reality few people do that and MacBooks are very efficient at drawing less power when their CPU is under-utilised, so 15W is usually enough to charge my MacBook (slowly) even whilst I'm using it. Even with heavy use, 15W is enough to keep it constantly above 90%+ of charge through hours of use.

If you refer to the Sandberg one you linked before, that's not USB-C ........

I have never seen a 100W USB-C car charger. USB-C PD can negotiate, and chargers have a lot of flexibility about how much power they supply.
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Thanks for pointing out my errors and apologies to all. Wrong link in my previous post. Click for correct link. This is indeed only a 63 watt charger. My laptop specifies 65 Watt. This will fast charge it from a twelve volt supply even when it is being used to the max - which I kind of like. Thanks also for noting that no 100 watt chargers seem to be available from a twelve volt supply. I was simply quoting 5 amps at 20 volts directly from the USB-C standard text as the top level negotiation specified by the standard, and I certainly only have mains chargers that actually deliver this. The flexibility in the standard, while an advantage, does bring headaches - I particularly dislike the bit about cables MAY be capable of 5 amps. Why on earth didn't they simply demand it? And none but the most reputable suppliers actually tell you how far up the negotiation table their chargers go or what their cables can carry. However, this charger is the best I have found. I have two. One "roving" and one that I dismantled and hard wired into the boat's electrics. I use them to fast charge several USB-C devices.

Apologies again for my error.
 
Amulet said:
Wrong link in my previous post. Click for correct link. This is indeed only a 63 watt charger. My laptop specifies 65 Watt.
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Your reply to mine was gracious so I feel pedantic disputing it but, to ensure no-one else gets caught out, the specifications section of that link says "Output 2: USB-C PD output (5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 2A) (Max 45W)*" (emphasis mine). The 63W total includes the other port.

You're still right that it's a better charger than the Belkins, though.
 
After an inverter killed my batteries daily I changed to a 8-35v psu which was a vast improvement. Still have it, spare if anyone has a use for it, it has a 20 pin plug to go on the motherboard after pulling the 240v out. Spare now because I changed to a Fit 2 pc, which was the bees knees. I also have the inverter 24-240 going begging.
fit-PC2 & fit-PC2i
 
KompetentKrew said:
Your reply to mine was gracious so I feel pedantic disputing it but, to ensure no-one else gets caught out, the specifications section of that link says "Output 2: USB-C PD output (5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 2A) (Max 45W)*" (emphasis mine). The 63W total includes the other port.

You're still right that it's a better charger than the Belkins, though.
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Yes. I did work that out and should've said so. The 45 watts seems to be enough to do my laptop. Many of these quote the sum of the two outputs in advertising, which is a bit pointless as there's no way to use that power for one device. I went to sleep thinking I should post a ps to this effect, so thanks for doing so !
 
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