Low drain NiMh - a first leak, AA cell

[Charlie+]

Just thaught I'd mention here what might be a freak one off!
Been using AA PP3 AAA low self drain NiMh cells for years without any
leakage like is usual with alkalines.
I baught about 40x of AA size roughly 8-10 years ago, 2000 mA headline
capacity. Used and abused them ever since, but if abused (reverse
charged etc in error), I always mark the cell.
Head-light torch has three AA - went dim - one cell of the three had
dropped down to 0.8V the other 2 were at 1.25 so examination showed 2 or
3 small pinprick areas of corrosion on the neg. end of the cell, not in
the main contact area, near the rim. dropped into glass of hot water
produced a shower of bubbles, so definitely a proper leak.
Not much sign of electrolyte damage so I guess that the cell had been
gently drying itself out for some time.

 

[Charlie+]

On Sat, 09 Dec 2017 07:57:30 +0000, Charlie+ <charlie@xxx.net> wrote as
underneath :

Just thaught I'd mention here what might be a freak one off!
Been using AA PP3 AAA low self drain NiMh cells for years without any
leakage like is usual with alkalines.
I baught about 40x of AA size roughly 8-10 years ago, 2000 mA headline
capacity. Used and abused them ever since, but if abused (reverse
charged etc in error), I always mark the cell.
Head-light torch has three AA - went dim - one cell of the three had
dropped down to 0.8V the other 2 were at 1.25 so examination showed 2 or
3 small pinprick areas of corrosion on the neg. end of the cell, not in
the main contact area, near the rim. dropped into glass of hot water
produced a shower of bubbles, so definitely a proper leak.
Not much sign of electrolyte damage so I guess that the cell had been
gently drying itself out for some time.

(Sorry Pressed the send button by mistake!)
My guess is that there was an inclusion fault in the original sheet
metal case of this cell... just thaught Id post in case others might
have had similar faults and its not a one off? C+

 

[Rheilly Phoull]

On 9/12/2017 4:03 PM, Charlie+ wrote:

On Sat, 09 Dec 2017 07:57:30 +0000, Charlie+ <charlie@xxx.net> wrote as
underneath :

Just thaught I'd mention here what might be a freak one off!
Been using AA PP3 AAA low self drain NiMh cells for years without any
leakage like is usual with alkalines.
I baught about 40x of AA size roughly 8-10 years ago, 2000 mA headline
capacity. Used and abused them ever since, but if abused (reverse
charged etc in error), I always mark the cell.
Head-light torch has three AA - went dim - one cell of the three had
dropped down to 0.8V the other 2 were at 1.25 so examination showed 2 or
3 small pinprick areas of corrosion on the neg. end of the cell, not in
the main contact area, near the rim. dropped into glass of hot water
produced a shower of bubbles, so definitely a proper leak.
Not much sign of electrolyte damage so I guess that the cell had been
gently drying itself out for some time.
(Sorry Pressed the send button by mistake!)
My guess is that there was an inclusion fault in the original sheet
metal case of this cell... just thaught Id post in case others might
have had similar faults and its not a one off? C+

Have we had any problems with leaking batteries ??

how long have you got ????

 

[Charlie+]

On Sun, 10 Dec 2017 07:34:33 +0800, Rheilly Phoull
<froggins@iinet.net.au> wrote as underneath :

On 9/12/2017 4:03 PM, Charlie+ wrote:
On Sat, 09 Dec 2017 07:57:30 +0000, Charlie+ <charlie@xxx.net> wrote as
underneath :

Just thaught I'd mention here what might be a freak one off!
Been using AA PP3 AAA low self drain NiMh cells for years without any
leakage like is usual with alkalines.
I baught about 40x of AA size roughly 8-10 years ago, 2000 mA headline
capacity. Used and abused them ever since, but if abused (reverse
charged etc in error), I always mark the cell.
Head-light torch has three AA - went dim - one cell of the three had
dropped down to 0.8V the other 2 were at 1.25 so examination showed 2 or
3 small pinprick areas of corrosion on the neg. end of the cell, not in
the main contact area, near the rim. dropped into glass of hot water
produced a shower of bubbles, so definitely a proper leak.
Not much sign of electrolyte damage so I guess that the cell had been
gently drying itself out for some time.
(Sorry Pressed the send button by mistake!)
My guess is that there was an inclusion fault in the original sheet
metal case of this cell... just thaught Id post in case others might
have had similar faults and its not a one off? C+

Have we had any problems with leaking batteries ??
how long have you got ????

I refer above specificly to low self drain NiMh (ie Eneloop type, though
that is a brand name)!
Judging by the response level here a failure of one of these is very
unusual indeed...
C+

 

[~misfit~]

Once upon a time on usenet Charlie+ wrote:

On Sun, 10 Dec 2017 07:34:33 +0800, Rheilly Phoull
froggins@iinet.net.au> wrote as underneath :

On 9/12/2017 4:03 PM, Charlie+ wrote:
On Sat, 09 Dec 2017 07:57:30 +0000, Charlie+ <charlie@xxx.net
wrote as underneath :

Just thaught I'd mention here what might be a freak one off!
Been using AA PP3 AAA low self drain NiMh cells for years without
any leakage like is usual with alkalines.
I baught about 40x of AA size roughly 8-10 years ago, 2000 mA
headline capacity. Used and abused them ever since, but if abused
(reverse charged etc in error), I always mark the cell.
Head-light torch has three AA - went dim - one cell of the three
had dropped down to 0.8V the other 2 were at 1.25 so examination
showed 2 or 3 small pinprick areas of corrosion on the neg. end of
the cell, not in the main contact area, near the rim. dropped
into glass of hot water produced a shower of bubbles, so
definitely a proper leak.
Not much sign of electrolyte damage so I guess that the cell had
been gently drying itself out for some time.
(Sorry Pressed the send button by mistake!)
My guess is that there was an inclusion fault in the original sheet
metal case of this cell... just thaught Id post in case others might
have had similar faults and its not a one off? C+

Have we had any problems with leaking batteries ??
how long have you got ????

I refer above specificly to low self drain NiMh (ie Eneloop type,
though that is a brand name)!
Judging by the response level here a failure of one of these is very
unusual indeed...
C+

I note that yours is not an Eneloop and you're avoiding posting the brand
name so am assuming it's a cheaper brand LSD NiMH cell.

You get what you pay for.
--
Shaun.

"Humans will have advanced a long, long way when religious belief has a cozy
little classification in the DSM*."
David Melville (in r.a.s.f1)
(*Diagnostic and Statistical Manual of Mental Disorders)

 

[Andy Burns]

~misfit~ wrote:

I note that yours is not an Eneloop and you're avoiding posting the brand
name so am assuming it's a cheaper brand LSD NiMH cell.

You get what you pay for.

My Sony Cyclenergy 2000 LSD cells retain more capacity after 8+ years
than my LIDL Tronic "2400" LSD cells had the day they left the shop ...

 

[Charlie+]

On Fri, 22 Dec 2017 18:50:07 +0000, Andy Burns <usenet@andyburns.uk>
wrote as underneath :

~misfit~ wrote:

I note that yours is not an Eneloop and you're avoiding posting the brand
name so am assuming it's a cheaper brand LSD NiMH cell.

You get what you pay for.

My Sony Cyclenergy 2000 LSD cells retain more capacity after 8+ years
than my LIDL Tronic "2400" LSD cells had the day they left the shop ...

Yes I think any AA cell claims of over 2000mAh for LSD need a sceptical
eye!
My cells were 2000 and I specificly didnt mention the brand so as to
avoid any brand arguments, it was leakage failures in the general type I
was after!! C+

 

[Andy Burns]

Charlie+ wrote:

Yes I think any AA cell claims of over 2000mAh for LSD need a sceptical
eye!

Just run four of the LIDL "2400mAh" cells through a
discharge/charge/discharge sequence on my charger at 200mA, they
achieved between 1146 and 1224mAh, you can tell their capacity is
misstated merely by their weight.

 

[Charlie+]

On Sun, 24 Dec 2017 09:08:34 +0000, Andy Burns <usenet@andyburns.uk>
wrote as underneath :

Charlie+ wrote:

Yes I think any AA cell claims of over 2000mAh for LSD need a sceptical
eye!

Just run four of the LIDL "2400mAh" cells through a
discharge/charge/discharge sequence on my charger at 200mA, they
achieved between 1146 and 1224mAh, you can tell their capacity is
misstated merely by their weight.

Drat! Just baught some of those Lidl multicoloured LSD packs for
grandchildren Xmas presents, I didnt read the 2400 capacity claim (my
goof), these sound a really bad buy if your right. Did you cycle them a
few times prior to measurement? C+

 

[Andy Burns]

Charlie+ wrote:

Drat! Just baught some of those Lidl multicoloured LSD packs for
grandchildren Xmas presents, I didnt read the 2400 capacity claim (my
goof), these sound a really bad buy if your right. Did you cycle them a
few times prior to measurement? C+

Only cycled 2-3 times.

Previous LIDL red cells and black cells have been fine, the bad ones
here are mainly silver not multi-coloured, you'll certainly tell they're
"underweight" as soon as you pick them up if they're the same innards.

 

[~misfit~]

Once upon a time on usenet Andy Burns wrote:

~misfit~ wrote:

I note that yours is not an Eneloop and you're avoiding posting the
brand name so am assuming it's a cheaper brand LSD NiMH cell.

You get what you pay for.

My Sony Cyclenergy 2000 LSD cells retain more capacity after 8+ years
than my LIDL Tronic "2400" LSD cells had the day they left the shop
...

Yep. I stick with Eneloop. They might only quote 75% of the power of some
brands but it's real capacity and is useful for hundreds of cycles.

I love my Maha MH-C9000 WizardOne charger. It cost me quite a bit back in
the day but it's still going strong and it keeps my cells in great
condition.
--
Shaun.

"Humans will have advanced a long, long way when religious belief has a cozy
little classification in the DSM*."
David Melville (in r.a.s.f1)
(*Diagnostic and Statistical Manual of Mental Disorders)