HP/Compaq laptop battery and/or charger problem

From	Roger Mills <watt.tyler@gmail.com>
Newsgroups	comp.sys.laptops, uk.d-i-y
Subject	HP/Compaq laptop battery and/or charger problem
Date	2011-08-14 21:49 +0100
Organization	Association of Revolting Peasants
Message-ID	<9aqqm1Fa1cU1@mid.individual.net> (permalink)

Cross-posted to 2 groups.

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My 8-year-old HP/Compaq nx9005 laptop has got a completely flat battery 
- or, rather, *two* completely flat batteries, because I bought a new 
one a few years ago and they are now both the same.

The power arrangements for this laptop are as follows:

The battery is lithium-ion, 14.8v, 4400mAH (type F4809). It has a row of 
LEDs on the side to indicate the state of charge.

The mains power supply delivers 18.5vDC through a cylindrical connector, 
which powers the laptop when on mains, and charges the battery via 
circuitry built into the laptop. There is a light on the front of the 
laptop which is amber when the battery is charging, and turns green when 
it is fully charged.

Well, that's what's *supposed* to happen. What *actually* happens is this:

If I 'charge' the battery for (say) 24 hours, the lamp is amber for the 
whole time and never turns green. If I remove the battery immediately 
after 'charging', it is stone cold and none of the charge indicator LEDs 
light when the test button is pressed.

Even after a long charging period, the battery won't start the laptop if 
mains power is not present. If when the laptop is running, mains power 
is removed, it stops dead.

If I run the laptop without a battery present, the charge lamp flashes 
amber (but is solid amber if a battery is present).

I have tried putting one of the batteries in the freezer for 2 days, and 
then thawing it and attempting to charge it - all to no avail.

Sorry for the long pre-amble! My question is this:

How can I tell whether the problem lies with the battery or with the 
internal charger? Are there any clues in what I have written above? I 
don't mind buying another new battery but, if the charger is duff, I 
will have wasted my money.

I usually run it on mains anyway, so it's not a total disaster if I 
can't make the battery work - but one does tend to expect a laptop to 
have its own built-in UPS!

TIA.
-- 
Cheers,
Roger
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Thread

HP/Compaq laptop battery and/or charger problem Roger Mills <watt.tyler@gmail.com> - 2011-08-14 21:49 +0100
  Re: HP/Compaq laptop battery and/or charger problem John Williamson <johnwilliamson@btinternet.com> - 2011-08-14 22:06 +0100
    Re: HP/Compaq laptop battery and/or charger problem Andy Burns <usenet.aug2009@adslpipe.co.uk> - 2011-08-14 22:33 +0100
    Re: HP/Compaq laptop battery and/or charger problem Roger Mills <watt.tyler@gmail.com> - 2011-08-14 22:54 +0100
      Re: HP/Compaq laptop battery and/or charger problem John Williamson <johnwilliamson@btinternet.com> - 2011-08-15 07:23 +0100
        Re: HP/Compaq laptop battery and/or charger problem Roger Mills <watt.tyler@gmail.com> - 2011-08-15 09:48 +0100
          Re: HP/Compaq laptop battery and/or charger problem John Williamson <johnwilliamson@btinternet.com> - 2011-08-15 16:14 +0100
  Re: HP/Compaq laptop battery and/or charger problem "Peter Crosland" <g6jns@yahoo.co.uk> - 2011-08-15 07:38 +0100
    Re: HP/Compaq laptop battery and/or charger problem Roger Mills <watt.tyler@gmail.com> - 2011-08-15 09:53 +0100
    Re: HP/Compaq laptop battery and/or charger problem "BillW50" <BillW50@aol.kom> - 2011-08-15 05:18 -0500
      Re: HP/Compaq laptop battery and/or charger problem NT <meow2222@care2.com> - 2011-08-19 15:33 -0700
        Re: HP/Compaq laptop battery and/or charger problem BillW50 <BillW50@aol.kom> - 2011-08-20 11:14 -0500
  Re: HP/Compaq laptop battery and/or charger problem "Brian Gaff" <Briang1@blueyonder.co.uk> - 2011-08-15 09:24 +0100
  Re: HP/Compaq laptop battery and/or charger problem Davey <davey@example.invalid> - 2011-08-15 10:55 +0100
    Re: HP/Compaq laptop battery and/or charger problem John Williamson <johnwilliamson@btinternet.com> - 2011-08-15 16:21 +0100
      Re: HP/Compaq laptop battery and/or charger problem Davey <davey@example.invalid> - 2011-08-15 16:36 +0100
  Re: HP/Compaq laptop battery and/or charger problem "Man at B&Q" <manatbandq@hotmail.com> - 2011-08-15 08:36 -0700
    Re: HP/Compaq laptop battery and/or charger problem AJL <2579843445nomail@none.com> - 2011-08-15 10:44 -0700
      Re: HP/Compaq laptop battery and/or charger problem "BillW50" <BillW50@aol.kom> - 2011-08-16 07:49 -0500
        Re: HP/Compaq laptop battery and/or charger problem AJL <1245nomail@none.com> - 2011-08-16 08:40 -0700
          Re: HP/Compaq laptop battery and/or charger problem "BillW50" <BillW50@aol.kom> - 2011-08-16 11:56 -0500
            Re: HP/Compaq laptop battery and/or charger problem AJL <1245nomail@none.com> - 2011-08-16 17:18 -0700
              Re: HP/Compaq laptop battery and/or charger problem "BillW50" <BillW50@aol.kom> - 2011-08-18 06:14 -0500
                Re: HP/Compaq laptop battery and/or charger problem AJL <1245nomail@none.com> - 2011-08-19 14:09 -0700
                Re: HP/Compaq laptop battery and/or charger problem BillW50 <BillW50@aol.kom> - 2011-08-19 19:13 -0500
                Re: HP/Compaq laptop battery and/or charger problem AJL <2579843445nomail@none.com> - 2011-08-19 21:41 -0700
                Re: HP/Compaq laptop battery and/or charger problem "dennis@home" <dennis@killspam.kicks-ass.net> - 2011-08-20 08:21 +0100
                Re: HP/Compaq laptop battery and/or charger problem AJL <2579843445nomail@none.com> - 2011-08-20 14:51 -0700
                Re: HP/Compaq laptop battery and/or charger problem "dennis@home" <dennis@killspam.kicks-ass.net> - 2011-08-20 23:37 +0100
                Re: HP/Compaq laptop battery and/or charger problem BillW50 <BillW50@aol.kom> - 2011-08-20 18:28 -0500
                Re: HP/Compaq laptop battery and/or charger problem Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> - 2011-08-21 01:48 +0200
                Re: HP/Compaq laptop battery and/or charger problem BillW50 <BillW50@aol.kom> - 2011-08-20 19:19 -0500
                Re: HP/Compaq laptop battery and/or charger problem Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> - 2011-08-21 03:00 +0200
                Re: HP/Compaq laptop battery and/or charger problem geoff <troll@uk-diy.org> - 2011-08-21 02:34 +0100
                Re: HP/Compaq laptop battery and/or charger problem geoff <troll@uk-diy.org> - 2011-08-21 02:32 +0100
                Re: HP/Compaq laptop battery and/or charger problem "dennis@home" <dennis@killspam.kicks-ass.net> - 2011-08-21 17:17 +0100
                Re: HP/Compaq laptop battery and/or charger problem AJL <2579843445nomail@none.com> - 2011-08-20 19:38 -0700
                Re: HP/Compaq laptop battery and/or charger problem "dennis@home" <dennis@killspam.kicks-ass.net> - 2011-08-21 17:25 +0100
                Re: HP/Compaq laptop battery and/or charger problem AJL <2367946nomail@none.com> - 2011-08-21 19:47 +0000
                Re: HP/Compaq laptop battery and/or charger problem BillW50 <BillW50@aol.kom> - 2011-08-20 11:13 -0500
                Re: HP/Compaq laptop battery and/or charger problem AJL <2579843445nomail@none.com> - 2011-08-20 15:15 -0700
                Re: HP/Compaq laptop battery and/or charger problem BillW50 <BillW50@aol.kom> - 2011-08-20 18:07 -0500
                Re: HP/Compaq laptop battery and/or charger problem AJL <2579843445nomail@none.com> - 2011-08-20 20:27 -0700
  Re: HP/Compaq laptop battery and/or charger problem "ghelf" <ghelf@sbcglobalDeathToSpam.net> - 2011-08-15 14:08 -0700
  Re: HP/Compaq laptop battery and/or charger problem digger <digger02XXX@gmail.com> - 2011-08-21 20:41 -0700
    Re: HP/Compaq laptop battery and/or charger problem Andy Burns <usenet.aug2009@adslpipe.co.uk> - 2011-08-22 04:59 +0100
    Re: HP/Compaq laptop battery and/or charger problem AJL <12468945nomail@none.com> - 2011-08-21 22:38 -0700
  Re: HP/Compaq laptop battery and/or charger problem jeradl <jeradl.4yvis4@no.email.invalid> - 2011-08-21 20:22 -0500
  Re: HP/Compaq laptop battery and/or charger problem tahrey <caedfaa9ed1216d60ef78a6f660f5f85_13854@example.com> - 2019-01-23 13:14 +0000

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