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Replacing NiCd batteries in an obsolete Uniden UH-052XR radio?
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c14
Dec 24, 2011, 11:15:23 PM12/24/11
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This is the one, http://www.atrc.com.au/uh050xr.htm
Although it's 10 years old it works OK and is built like a tank which is why I
would like to replace the long expired detachable NiCad battery pack which is no
longer available as a spare part (model BP-052).
The problem is that the battery pack is also built like a tank and there is no
obvious way of pulling it apart. There are no screws, glue or weld lines.
Has anyone tried surgery on one of these? There's no heavy or light end so I
don't know where to start.
The original battery spec was 7.2v, 950mAh.
There's a captive attachment screw that runs through the middle of the pack from
bottom to top slightly offset to one side, so I'm assuming that it fits in the
gap between 4 of the 6 (?) batteries arranged vertically inside.
Mike
Although it's 10 years old it works OK and is built like a tank which is why I
would like to replace the long expired detachable NiCad battery pack which is no
longer available as a spare part (model BP-052).
The problem is that the battery pack is also built like a tank and there is no
obvious way of pulling it apart. There are no screws, glue or weld lines.
Has anyone tried surgery on one of these? There's no heavy or light end so I
don't know where to start.
The original battery spec was 7.2v, 950mAh.
There's a captive attachment screw that runs through the middle of the pack from
bottom to top slightly offset to one side, so I'm assuming that it fits in the
gap between 4 of the 6 (?) batteries arranged vertically inside.
Mike
Phil Allison
Dec 24, 2011, 11:33:43 PM12/24/11
to
"c14" <c14@c14
>
> Although it's 10 years old it works OK and is built like a tank which is
> why I
> would like to replace the long expired detachable NiCad battery pack which
> is no
> longer available as a spare part (model BP-052).
>
> The problem is that the battery pack is also built like a tank and there
> is no
> obvious way of pulling it apart. There are no screws, glue or weld lines.
> Has anyone tried surgery on one of these? There's no heavy or light end so
> I
> don't know where to start.
>
> The original battery spec was 7.2v, 950mAh.
** Means there are 6 AA " high capacity" cells inside.
> Although it's 10 years old it works OK and is built like a tank which is
> why I
> would like to replace the long expired detachable NiCad battery pack which
> is no
> longer available as a spare part (model BP-052).
>
> The problem is that the battery pack is also built like a tank and there
> is no
> obvious way of pulling it apart. There are no screws, glue or weld lines.
> Has anyone tried surgery on one of these? There's no heavy or light end so
> I
> don't know where to start.
>
> The original battery spec was 7.2v, 950mAh.
WES may have some Sanyo KR900 cells available - but they will be old stock.
Replacement with NiMHs is the way to go - capacity will then be 2000mAh or
more - check the old cells for height, it may be critical to get
replacements that are no taller.
> There's a captive attachment screw that runs through the middle of the
> pack from
> bottom to top slightly offset to one side, so I'm assuming that it fits in
> the
> gap between 4 of the 6 (?) batteries arranged vertically inside.
Bind it back together with some 3M Strapping Tape - like normal tape but
thicker and with fibreglass strands.
... Phil
Barry OGrady
Dec 25, 2011, 1:18:51 AM12/25/11
to
>Mike
==========
Ian Field
Dec 25, 2011, 5:16:51 PM12/25/11
to
"c14" <c14@c14> wrote in message
news:i76df7hhqblen41a4...@4ax.com...
If its a high current draw application most older NiMh will get hot under
load - so the energy is expended heating the cells instead of powering the
device, this will be abundantly aparent when cells with twice the rated Ah
capacity only run for 1/3 as long as NiCd cells did.
Check whether the original charger has dV charge control - the dip in
terminal voltage on a NiMh cell at charge full is more subtle than on NiCd,
most automatic NiCd chargers won't detect the full charge dV point of NiMh
and so cook the cells.
Phil Allison
Dec 25, 2011, 11:25:41 PM12/25/11
to
"Ian Field"
>
> If you replace with NiMh there's a couple of things to watch out for.
>
> If its a high current draw application most older NiMh
** Huh - how is the OP ever likely to install old MiNH cells ???
> If you replace with NiMh there's a couple of things to watch out for.
>
> If its a high current draw application most older NiMh
We know what the app is (see heading) and the drain is not high for NiMHs.
> Check whether the original charger has dV charge control ...
** Almost guaranteed to be a slow ( ie 8 hour or more) charger that tapers
off as the battery voltage rises.
Probably start at about 150mA and drop to 65mA.
Perfectly OK with NiMH - as the nominal 20 hour rate with 2000mAh cells
is 100mA.
... Phil
William Downing
Apr 20, 2021, 4:59:22 PM4/20/21
to
Sorry for bumping this old thing but was there any ever way of getting it open? I don't really want to bring a hack saw to my device...
Kind Regards,
Will.
Kind Regards,
Will.
Andrew Ford
Feb 6, 2022, 10:07:21 PM2/6/22
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