Dead HBH-35?

Hi,

I've just gone to charge up my HBH-35 headset, which hasn't been used
for a couple of months, and it won't charge!

Instead of the solid red light I get a flashing red light and the
battery isn't charging at all.

Anyone know what the problem might be? Has it just gone so flat that it
won't charge? Is there anything I can do or is it toast?

Many thanks.
--
Toby

---

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[POSTED TO alt.cellular.ericsson - REPLY ON USENET PLEASE]

In <[email protected]> on Mon, 08 Aug 2005 22:01:02 GMT, Toby
Groves <[email protected]> wrote:

>I've just gone to charge up my HBH-35 headset, which hasn't been used
>for a couple of months, and it won't charge!
>
>Instead of the solid red light I get a flashing red light and the
>battery isn't charging at all.
>
>Anyone know what the problem might be? Has it just gone so flat that it
>won't charge?

Sounds like it.

>Is there anything I can do or is it toast?

Toast.

I had the same thing happen to an old HBH-30. Lifespan is limited by the
battery technology.

--
Best regards, HELP FOR CINGULAR GSM & SONY ERICSSON PHONES:
John Navas <http://navasgrp.home.att.net/#Cingular>

In article <61RJe.8112$p%[email protected]>, John Navas
<[email protected]> wrote:

> [POSTED TO alt.cellular.ericsson - REPLY ON USENET PLEASE]
>
> In <[email protected]> on Mon, 08 Aug 2005 22:01:02 GMT, Toby
> Groves <[email protected]> wrote:
>
> >I've just gone to charge up my HBH-35 headset, which hasn't been used
> >for a couple of months, and it won't charge!
> >
> >Instead of the solid red light I get a flashing red light and the
> >battery isn't charging at all.
> >
> >Anyone know what the problem might be? Has it just gone so flat that it
> >won't charge?
>
> Sounds like it.
>
> >Is there anything I can do or is it toast?
>
> Toast.
>
> I had the same thing happen to an old HBH-30. Lifespan is limited by the
> battery technology.

Batteries need a base level charge or it'll die. That's my experience
too. However, a dealer once resurrected a rechargeable battery by
putting a higher current/voltage in to "jump" start it. It did work, as
if to just get to a certain base level.

--

[POSTED TO alt.cellular.ericsson - REPLY ON USENET PLEASE]

In <090820051303004260%[email protected]> on Tue, 09 Aug 2005 03:03:00 GMT,
Artoi <[email protected]> wrote:

>In article <61RJe.8112$p%[email protected]>, John Navas
><[email protected]> wrote:

>> I had the same thing happen to an old HBH-30. Lifespan is limited by the
>> battery technology.
>
>Batteries need a base level charge or it'll die. That's my experience
>too. However, a dealer once resurrected a rechargeable battery by
>putting a higher current/voltage in to "jump" start it. It did work, as
>if to just get to a certain base level.

You were lucky. It's usually more a matter of cell inversion caused by
excessive discharge, which is often completely fatal.

--
Best regards, HELP FOR CINGULAR GSM & SONY ERICSSON PHONES:
John Navas <http://navasgrp.home.att.net/#Cingular>

On Tue, 09 Aug 2005 03:03:00 GMT, Artoi <[email protected]> wrote:

>In article <61RJe.8112$p%[email protected]>, John Navas
><[email protected]> wrote:
>
>> [POSTED TO alt.cellular.ericsson - REPLY ON USENET PLEASE]
>>
>> In <[email protected]> on Mon, 08 Aug 2005 22:01:02 GMT, Toby
>> Groves <[email protected]> wrote:
>>
>> >I've just gone to charge up my HBH-35 headset, which hasn't been used
>> >for a couple of months, and it won't charge!
>> >
>> >Instead of the solid red light I get a flashing red light and the
>> >battery isn't charging at all.
>> >
>> >Anyone know what the problem might be? Has it just gone so flat that it
>> >won't charge?
>>
>> Sounds like it.
>>
>> >Is there anything I can do or is it toast?
>>
>> Toast.
>>
>> I had the same thing happen to an old HBH-30. Lifespan is limited by the
>> battery technology.
>
>Batteries need a base level charge or it'll die. That's my experience
>too. However, a dealer once resurrected a rechargeable battery by
>putting a higher current/voltage in to "jump" start it. It did work, as
>if to just get to a certain base level.

Many can be resurrected if you get a surface charge on them
For example the MAHA 777 II chargers won't give up on a battery until
it is tried charging it at 850ma for 3 minutes. However I have some 30
and 15 minute AA chargers that refuse to charge a truely dead NiMh or
NiCd.

For those, I connect them up to a lab supply set for 1 amp at 1.25
volts. Takes about 15 seconds for the current to come down from the 1
amp limit to about 30ma. Once that has been done to them, they charge
just fine in a fast charger.

In article <[email protected]>, matt weber
<[email protected]> writes
>Many can be resurrected if you get a surface charge on them
>For example the MAHA 777 II chargers won't give up on a battery until
>it is tried charging it at 850ma for 3 minutes. However I have some 30
>and 15 minute AA chargers that refuse to charge a truely dead NiMh or
>NiCd.
>
>For those, I connect them up to a lab supply set for 1 amp at 1.25
>volts. Takes about 15 seconds for the current to come down from the 1
>amp limit to about 30ma. Once that has been done to them, they charge
>just fine in a fast charger.

We have a lab PSU at work I could try but presumably I can't just run
this through the power terminals on the headset and thus through the
internal circuitry, I'd have to remove the battery somehow and connect
the supply directly to it?
--
Toby

In article <[email protected]>, matt weber
<[email protected]> writes
>For those, I connect them up to a lab supply set for 1 amp at 1.25
>volts. Takes about 15 seconds for the current to come down from the 1
>amp limit to about 30ma. Once that has been done to them, they charge
>just fine in a fast charger.

Right, well I've just given this a try.

Noticed the SE charger is rated at 5.1v/450ma and my Nokia charger is
5.7v/800ma so I decided to give it a bash using the Nokia charger and
some bits of wire.

Amazingly as soon as I made contact with the terminals I got the solid
red light which should indicate charging. I left it connected to the
Nokia charger for about 2 mins and then plugged the SE charger back in
and I now have a solid red light from that too.

Will have to wait to see if it charges and works but fingers crossed
this has sorted it. Many thanks Matt
--
Toby

On Sat, 13 Aug 2005 11:01:55 GMT, Toby Groves <[email protected]>
wrote:

>In article <[email protected]>, matt weber
><[email protected]> writes
>>Many can be resurrected if you get a surface charge on them
>>For example the MAHA 777 II chargers won't give up on a battery until
>>it is tried charging it at 850ma for 3 minutes. However I have some 30
>>and 15 minute AA chargers that refuse to charge a truely dead NiMh or
>>NiCd.
>>
>>For those, I connect them up to a lab supply set for 1 amp at 1.25
>>volts. Takes about 15 seconds for the current to come down from the 1
>>amp limit to about 30ma. Once that has been done to them, they charge
>>just fine in a fast charger.
>
>We have a lab PSU at work I could try but presumably I can't just run
>this through the power terminals on the headset and thus through the
>internal circuitry, I'd have to remove the battery somehow and connect
>the supply directly to it?
Yes.

alternatively, you can keep trying to charge it with the supplied
charger. Connect, when it starts to flash, disconnect, wait a minute
and try again. It may take 10-20 attempts to get enough charge on it
to properly charge. I've done that with AA NiMh's and a fast charger.

In article <[email protected]>, matt weber
<[email protected]> writes
>alternatively, you can keep trying to charge it with the supplied
>charger. Connect, when it starts to flash, disconnect, wait a minute
>and try again. It may take 10-20 attempts to get enough charge on it
>to properly charge. I've done that with AA NiMh's and a fast charger.

All revived and working again, many thanks
--
Toby