Laptop charger 24v - advice pls!

[Lemming Train]

I've bought an Honor Magicbook 14" and want to take it with me to use in my truck. It comes with a "fast charge" 65W USB-C wall charger according to the blurb on the spec tab here : https://www.hihonor.com/unitedkingdom/product/hono...

The truck is 24v and has a 24v cig socket and also a separate USB (powered) socket which I use for charging my phone. Not sure what the ampage is.

Can anyone advise on what device I need for the truck to charge it without blowing up the laptop?

I don't know if one of the 24v cig socket type chargers from this page would do : https://www.amazon.co.uk/s?k=24v+laptop+charger+tr.... I don't have any other need for an inverter so seems a bit overkill.

I haven't got a clue what the difference is between pure sine wave and modified sine wave either.

Thanks .

[WatchfulEye]

I'd try something like this:
https://www.amazon.co.uk/Anker-Charger-PowerDrive-...

It's USB-c which should be universally compatible and auto adjust to the capabilities of both charger and laptop to find a mutually acceptable charge rate.

The anker ciggy adaptors are dual voltage 12V and 24V so will work fine on a truck.

This particular adaptor will give 30W over USB c which won't give a fast charge but should do the job.

[Lemming Train]

WatchfulEye said:

I'd try something like this:
https://www.amazon.co.uk/Anker-Charger-PowerDrive-...

It's USB-c which should be universally compatible and auto adjust to the capabilities of both charger and laptop to find a mutually acceptable charge rate.

The anker ciggy adaptors are dual voltage 12V and 24V so will work fine on a truck.

This particular adaptor will give 30W over USB c which won't give a fast charge but should do the job.

Thanks. Just for my peace of mind, do you have a source for them being dual voltage and okay for 24v? It's not mentioned in the ad and an internet search for "anker 24v charger" and other similar searches has not resulted in any hits. Understandably I don't want to end up frying the charger or worse, the laptop!

[Mr Pointy]

According to the Anker website/manual it can take 12 or 24v:

https://www.anker.com/uk/products/variant/powerdri...
https://d2211byn0pk9fi.cloudfront.net/eu/accessori...

Note the power output depends on the voltage your device needs:
5v/9v - 3A
15v - 2A
20V - 1.5A

[Mr Pointy]

There are even higher power devices available but there are comments about them running hot:

https://www.amazon.co.uk/dp/B077ZRBPNB

[Lemming Train]

OK thank you both. I have ordered the Anker one!

[drdino]

That Anker one can output 30w from the Type C slot, it might struggle to charge and power the laptop.

I use this one in my car:
https://satechi.net/products/72w-type-c-pd-car-cha...

[Lemming Train]

drdino said:

That Anker one can output 30w from the Type C slot, it might struggle to charge and power the laptop.

I use this one in my car:
https://satechi.net/products/72w-type-c-pd-car-cha...

Yes, Watchfuleye pointed out that caveat in his post. Pointy has mentioned the higher output ones have a tendency to run hot and get a bit melty so there doesn't appear to be a perfect solution here. :/

[Who me ?]

Simple solution is to use a regulator on the negative rail, which can use the car chassis as a heatsink . If you really want to go for a few amps, then it's either a positive regulator ( most possibly a high power transistor with an insulated heatsink) or regulate the negative line with an equivalent PNP power transistor, which uses car body as heatsink and does not require any insulation between body of power transistor .

[Lemming Train]

[quote=Who me ?]Simple solution is to use a regulator on the negative rail, which can use the car chassis as a heatsink . If you really want to go for a few amps, then it's either a positive regulator ( most possibly a high power transistor with an insulated heatsink) or regulate the negative line with an equivalent PNP power transistor, which uses car body as heatsink and does not require any insulation between body of power transistor .
[/quote]

I'm sure that's great and you know what you're doing but you're talking to an electrics noob so all that's just gone straight over my head and you may as well be talking about house bricks .