I use my laptop a lot, for work, editing photos, internet and most often for producing music. For this reason, I need a reliable laptop charger in my van. Something I can use daily that doesn’t kill the van’s leisure batteries.
I also wanted a laptop charger that runs without the use of my inverter, so needed one that runs directly off 12V, using the cigarette lighter socket. I certainly can use my 1000W inverter, and plug my original laptop charger into it, but this is overkill and not very energy efficient, so I started looking into powering a laptop from a car battery (or leisure batteries in my case).
My requirements were:
- 12V to 19V laptop charger (for my Acer Aspire laptop)
- Plugs directly into a cigarette lighter socket (I have multiple in my van)
- Energy efficient
- But still powerful enough to charge my laptop quickly
- Quality – it needed to power my laptop without it interfering with my audio equipment
I started digging, reading many forums, and even learning about DC-DC converters to get a better understanding what it was that I needed. After a lot of research, I found a Universal 12V laptop charger (Amazon).
This charger certainly seemed like it fit the bill. It looked well built, had 90W of power output (more than enough for most laptops), plugs straight into a cigarette lighter socket and even has 2 USB sockets to power tablets, phones or whatever other 5V USB device you might have. So I took the plunge and bought it off Amazon.
I’ve had it for a couple of months now, and use it every single day. I must say that I’m very impressed. I can now power my laptop straight from my leisure batteries without the use of my inverter, which is more energy efficient and a lot more convenient.
A note about inverters:
Inverters change 12V DC to 220vAC (110V in some countries), and do this in one of two ways. 1 is modified sine wave (MSW), which is not the same as mains power in your home, and 2 is pure sine wave (PSW) which is the ‘clean’ type of AC power, similar to what you have at home.
Unfortunately, the cheap inverters are almost always modified sine wave inverters, and this is a problem when it comes to laptops. In some cases, a cheap MSW inverter will cause your laptop screen to flcker when plugged in, which pretty much renders your laptop useless, so these aren’t a practical solution for laptops.
A pure sine wave inverter works just fine with laptops, but even so, inverters aren’t very efficient for charging laptops. An inverter steps up your 12V to 220V (or 110V), and then the laptop charger will step the power back down to 18.5V, 19V, 20V etc. depending on your laptop.
In each of these steps, there’s a power loss. Also, if you leave your inverter switched on, even when it’s not charging your laptop, it is still draining power from your battery.
So even though I have a 1000W pure sine inverter in my van, still wanted something that was efficient (and convenient) for charging my laptop.
Let’s take a look at the 12v laptop charger that I have:
This charger comes with 14 ‘tips’ and a data sheet to help you locate the correct connection and voltage for your device. All you need to do is find the voltage and current on your original charger, and cross reference this along with your laptop’s brand to the data sheet. Once you have the correct tip, connect it to the end of the cable and plug in.
Input: 11V DC – 15V DC
Output: 18.5V/ 19V/ 19.5/ 20V DC
USB output: 5V 2.1A, 5V 1A
Tip details and compatible brands:
|Tip||Voltage & Current||Size||Compatible Brands|
|M3||16V, 4A||6.5*4.5*1.35mm||SONY, FUJITSU|
|M5||19V, 2.37A/3.42A/4.74A||5.5*2.5mm||TOSHIBA, ASUS|
|M6||19V, 3.16A/4.74A||5.0*3.0mm with pin||SAMSUNG|
|M8||19.5V, 2A/3.9A/4.7A||6.5*4.4mm with pin||SONY|
|M9||19.5V, 3.34A/4.62A||7.4*5.0mm with pin||DELL|
|M11||20V, 3.25A/4.5A||7.9*5.4mm with pin||LENOVO/IBM|
|M12||18.5V, 3.5A/4.74A||7.4*5.0mm with pin||HP|
|M18||19V, 2.1A/2.37A/3.42A||3.0*1.0mm||Acer, SAMSUNG, ASUS|
|M20||19V, 3.42A/4.74A||5.5*1.7mm||ACER, GATEWAY|
|M21||19.5V, 2.31A/3.33A||4.5*3.0mm with pin||HP|
|M22||19.5V, 2.31A/3.34A/4.62A||4.5*3.0mm with pin||DELL|
|M27||20V, 3.25A/4.5A||11*5.0mm Square Yellow Tip||LENOVO|
|M28||19.5V, 2.31A/3.33A||4.8*1.7mm with step plastic||HP|
This laptop charger works well for my needs. The only gripe I have is that the cable is a bit short. At 4ft, it just doesn’t reach as far as I wanted. This isn’t a major issue, and I just bought myself a cigarette lighter socket extension (Amazon) to solve this problem. If you need one of these, make sure it can handle a higher current – 10A will be plenty.
It’s worth noting that here’s also a “brick” version of this product. Although it’s bigger, in some vehicles the “plug-in” one that I have will not fit into your cigarette lighter socket, depending on where it’s located, so just keep this in mind.
All in all, I’m very happy with this charger, it’s made my life a lot easier.
I hope you enjoyed reading my review. If you have any questions, please leave a comment below. If you want to go ahead and get yourself one now, you can get the charger from Amazon right here (Amazon).