Manually changing laptop adapter connector

[antobag]

Hi all,

I've completed a solar panel set-up where I charge everything using DC power from a 12V battery. The appliances are connected to the battery with a cigarette lighter port. I've been buying specific "in-car" adapters for each appliance according to their voltages, etc, and everything had been going smoothly...

...until today! I bought a laptop charger adapter that I assumed would fit my laptop (the voltage and amperage were both correct at 19V, 4.74A) BUT the connector pin does not fit. I can push it into my laptop port and hold it there, the laptop will say that it's charging, but the connector falls out as soon as I let go. Obviously I picked up the wrong charger for my laptop. I was wondering:

Is it possible (and safe for my laptop) to merely cut off the connector of the incorrect charger, buy a connector that fits my laptop and connect the wires together? I need the adapter by Sunday and I doubt I'll have time to order a new one in.

Any help would be much appreciated.

 

[Steve from MRO Calgary]

Most Switchmode power supplies need to see feedback from the plug to function correctly. Sometimes it is as simple as a third wire. Cutting the plug off removes the feedback circuit and the power supply doesn't work. A better option is to get an connector adapter from Targus, Velleman or Philmore.

 

[antobag]

Thanks Steve. Unfortunately I can't seem to find any of those brands in stock near me (I'm in the UK). I know there is a Maplin near me, would one of these suffice? http://www.maplin.co.uk/p/12v-auto-...ter-with-1a-usb-socket-12-charging-tips-a83la

It's expensive for what it is, and it's not specifically designed to go with my laptop (I've heard a few bad things about universal chargers). But if it's safe to use for a 19V, 4.74A (90W) laptop then it'll have to do under my time constraints. I won't be using it permanently, just for a month or so.

 

[ericwilk]

Radio shack used to sell them in just about any shape / size, along with adapters.

Make sure to check polarity.

V/A doesn't matter if it's just the tip (and not supply) you are replacing.

They are 2 pieces of metal (might have a rating though, best to not exceed it if so).