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Strange battery behaviour


Hello,
I bought a cheap generic battery from Hong Kong for my elderly Compaq
Evo 410 to replace the original which now only lasts about 10 minutes.

The new battery can run the laptop for about an hour and a half, with
the screen on all the time and frequent HDD access. About right I
reckon. But the strange thing is that the laptop won't start up or come
out of hibernation with the new battery. Not even if the mains power is
connected. The only way of waking it up is to remove the battery and
start with the mains power. Once booted I can insert the battery and
remove the mains.

OK, I can live with this, just about (not really. Sometimes I need to
start up the machine when on the move - after all, it's what a laptop is
for). But I really can't understand it. Any comments anyone?

"Salvador Freemanson" <s@gohome.com> wrote in message

news:464161e5$0$29103$426a74cc@news.free.fr

> Hello,
> I bought a cheap generic battery from Hong Kong for my elderly Compaq
> Evo 410 to replace the original which now only lasts about 10 minutes.

> The new battery can run the laptop for about an hour and a half, with
> the screen on all the time and frequent HDD access. About right I
> reckon. But the strange thing is that the laptop won't start up or
> come out of hibernation with the new battery. Not even if the mains
> power is connected. The only way of waking it up is to remove the
> battery and start with the mains power. Once booted I can insert the
> battery and remove the mains.

> OK, I can live with this, just about (not really. Sometimes I need to
> start up the machine when on the move - after all, it's what a laptop
> is for). But I really can't understand it. Any comments anyone?

Well a few things comes to mind. One do you still have the old battery?
If so, does that one still fire up the laptop? If so, then the new cheap
battery can't handle the surge is my guess.

Another thing it could be is as a laptop ages, it isn't uncommon for it
to use more power as it ages. It might be drawing more at startup and
exceeds the battery specs.

The part that it won't startup on AC with the battery installed worries
me. As that is usually a hardware problem. Like either the battery, AC
adapter, or the laptop itself. You also didn't mention if it can fire
out of standby. Can it on battery?

--
Bill

-----------------------------------------------Reply-----------------------------------------------

BillW50 wrote:
> Well a few things comes to mind. One do you still have the old battery?
> If so, does that one still fire up the laptop? If so, then the new cheap
> battery can't handle the surge is my guess.

Yes, it does start with the old battery, whether the mains adapter is
connected or not.

> Another thing it could be is as a laptop ages, it isn't uncommon for it
> to use more power as it ages. It might be drawing more at startup and
> exceeds the battery specs.

> The part that it won't startup on AC with the battery installed worries
> me. As that is usually a hardware problem. Like either the battery, AC
> adapter, or the laptop itself. You also didn't mention if it can fire
> out of standby. Can it on battery?

It can on the old battery. On the new one, only sometimes. Seems to
depend on the state of charge.

-----------------------------------------------Reply-----------------------------------------------
"Salvador Freemanson" <s@gohome.com> wrote in message

news:4641d336$0$26059$426a74cc@news.free.fr

Oh it really sounds like you have a defective battery, or these Hong
Kong batteries are not built to original specs. :(

--
Bill

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