high power laptop car adapter

[prosodyspeaks]

hi, thanks is for reading!

TLDR: where can I get a 135w+ 19v car charger?

I just bought a laptop (an acer aspire Nitro v15 VN7-592G) and have discovered it ships with a 135w (19v@7A) adapter.

I live in a truck and generally use 12 volt leisure batteries - charged from a mix of solar(English winter says no), the engine alternator, and sporadic mains hookups - as my primary power source.

my previous laptop adapter was 65w and I had no trouble sourcing car 'chargers' to run it, but I am unable to find one which provides 135+w, except for a 'universal' one which (having used similar in the past) I am not keen on for long-term usage as the voltage selector switch can be accidentally adjusted and the removable interchangeable tips do not provide a particularly good connection and can come loose.

The other option I have considered is using an inverter to bring my 12v upto 240 and the OEM acer adapter to get back down to 19v. this would not be very energy efficient which is an issue as my power is limited and I've been waiting to play fallout 4 for ages so I want to maximise my potential laptop time! also, I'm not keen on a modified sine inverter and pure sine models are fairly expensive.

do you know where I can get a 19v 135+w car charger? (preferably with a 5mm x 1.7mm dc jack but I'd be happy enough with any size I can cut off and transplant a suitable size jack sourced separately)

what are the implications of using a modified sine wave via the original acer power brick? I'm not too concerned about damaging the transformer but don't want to hurt the laptop...

any other solutions?

thanks!

 

[kraelic]

I had a 120W lighter plug charger for a gateway fx laptop previously, from ebay and china. It would blow the lighter fuse every so often. Just too much draw at 12V for most cars. True sine wave is better for electronics. Modified may introduce pulses or noise into the system, maybe stopping the laptop from recognizing the charger to protect itself. A dell I had would not detect its 90W at times.

 

[prosodyspeaks]

that might be your car lighter socket / fuse being 10A or less.... i'm in a converted truck with short runs of 6mm2 wiring and 20A sockets, so i'm rated up to 240w....

that said, it looks like i'll be getting a pure sine inverter. but i don't like to buy cheap nasty things at the best of times, least of all a transformer that is installed in my living space, which means i'm set on getting a victron @ £80 or more. essentially for a laptop charger!