"Jim K" wrote in message
...
On Jul 2, 12:53 pm, "Man at B&Q" wrote:
On Jul 2, 12:39 pm, Jim K wrote:



do laptop chargers "sense" and adjust their output somehow?? meaning I
can't actually say 100% it's the charger that's shagged & just acquire
a new one...?

All help appreciated

Cheers
Jim K

All the "chargers" I've seen are just switch mode power supplies.
Indeed, the generic replacements (rather than branded) ones make very
good power supplies for other uses. Shouldn't cost mor ethan £20 for a
new one.

The charging intelligence is in the laptop and/or battery.

MBQ

Righto.

So I chopped the jack of the end to reveal a 3 core cable (which
surprised me a bit - was expecting 2)

There's an outer screen of decent multistrand (1) , then inside that
another smaller screen (2) & a core (3)

Now I can indeed get 19.5 from the bare end from the tranny -across 1
& 2
When I test across from 3 to 2 - i get 12.5v...

On the jack plug end (now removed and opened up to check) there are
indeed 3 connections - Outer screen (1) to outside of jackplug, inner
screen (2) to (appears to be) the inner surface of the jackplug ??, &
Central core (3) to centre pin.

Is this making any sense to anyone?

Its likely documented on the net but you didn't specify the laptop model
etc.