Re: Charging a laptop battery without the laptop?



<martin_pentreath@xxxxxxxxxxx> wrote in message
news:aa715aa6-3ac1-406f-9004-5a021c74ab71@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi,

I have a Dell laptop which has developed a fault. It doesn't recognise
its own power supply. A bit of internet research reveals that this is
a common fault on this particular model, and it's a fault with the
motherboard, so an expensive repair. At the moment for me the fault is
intermittent. Sometimes the power supply is recognised and the thing
will run happily from the mains and charge the battery, sometimes it
isn't and it runs from the battery. Pretty soon a time will come when
the battery goes flat, the power supply won't be recognised at all and
it will be screwed unless I replace the motherboard.

To get to the point I could easily keep the PC running if I could
charge the battery without it being in the laptop. Anyone know what my
chances are? The battery has eight pins. I presume it has some
circuitry inside which means it's not as easy as guessing the right
two pins and putting a current across them.

Cheers!

Martin


Charging lithium-ion batteries is fairly complex. Only two of the 8
contacts are used to power the laptop, but many more are used during
charging in order to monitor individual cells. It is definite not
just finding the right two wires. Good luck. I hate it when a
complex thing is rendered useless by a simple problem.



.

Relevant Pages

  • Re: Charging a laptop battery without the laptop?
    ... I have aDelllaptop which has developed a fault. ... It doesn't recognise ... isn't and it runs from the battery. ... In fact, he stated that it categorically could 'not' be the problem (although that answer was in response to a different query, regarding aftermarket supplies which are known to produce nearly the same symptoms). ...
    (sci.electronics.repair)
  • Re: Charging a laptop battery without the laptop?
    ... I have a Dell laptop which has developed a fault. ... It doesn't recognise ... isn't and it runs from the battery. ...
    (sci.electronics.repair)
  • Re: Charging a laptop battery without the laptop?
    ... I have a Dell laptop which has developed a fault. ... It doesn't recognise ... isn't and it runs from the battery. ... charge the battery without it being in the laptop. ...
    (sci.electronics.repair)
  • Charging a laptop battery without the laptop?
    ... I have a Dell laptop which has developed a fault. ... It doesn't recognise ... isn't and it runs from the battery. ...
    (sci.electronics.repair)
  • Re: Weird fault with Acer Aspire 1640
    ... everything seemed OK except for thekeyboard/touchpad. ... laptop shows it is on AC power all the time even when on battery ... perfectly if the battery is removed and laptop is run off AC mains. ... Did you get a solution for this fault as I have anAcer3000 with the ...
    (comp.sys.laptops)