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Lithium battery capacities (18650).

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elektroda.net NewsGroups Forum Index - Electronics - Lithium battery capacities (18650).

Ian Field
Guest

Mon Dec 22, 2014 1:26 am   



Having discovered that recycling bins in various shops are a good source of
lithium battery packs that can be put to various uses, I notice quite a
spread in claimed Ah capacities on the information labels.

The first aquisition was labelled "5.2Ah" - there weren't any parallel
combinations as it contained an uneven number of cells.

The next rescue was marked "4.2Ah", and contained 3 sets of parallel pairs -
so I assume the individual cell capacity is 2.1Ah.

The next was lowest yet at 2.0Ah.

This seems to be quite a spread for apparently identical cells, so I'm
wondering if I'm missing something?!

Thanks for any help.

Tough Guy no. 1265
Guest

Sun Aug 02, 2015 2:00 am   



On Sun, 21 Dec 2014 18:26:06 -0000, Ian Field <gangprobing.alien_at_ntlworld.com> wrote:

Quote:
Having discovered that recycling bins in various shops are a good source of
lithium battery packs that can be put to various uses, I notice quite a
spread in claimed Ah capacities on the information labels.

The first aquisition was labelled "5.2Ah" - there weren't any parallel
combinations as it contained an uneven number of cells.

The next rescue was marked "4.2Ah", and contained 3 sets of parallel pairs -
so I assume the individual cell capacity is 2.1Ah.

The next was lowest yet at 2.0Ah.

This seems to be quite a spread for apparently identical cells, so I'm
wondering if I'm missing something?!

Thanks for any help.


On a similar note, I bought some Lithium Ion AA batteries from China on Ebay. They claim to be 2.5 amp hours. Yet a 1 amp charger fills them in just over an hour. I suspect they lie about the capacity.

--
But she was always fat. She was born an only twin.

Ian Field
Guest

Sun Aug 02, 2015 2:55 am   



"Tough Guy no. 1265" <no_at_spam.com> wrote in message
news:op.x2pgicd5cpfvgl_at_red.lan...
Quote:
On Sun, 21 Dec 2014 18:26:06 -0000, Ian Field
gangprobing.alien_at_ntlworld.com> wrote:

Having discovered that recycling bins in various shops are a good source
of
lithium battery packs that can be put to various uses, I notice quite a
spread in claimed Ah capacities on the information labels.

The first aquisition was labelled "5.2Ah" - there weren't any parallel
combinations as it contained an uneven number of cells.

The next rescue was marked "4.2Ah", and contained 3 sets of parallel
pairs -
so I assume the individual cell capacity is 2.1Ah.

The next was lowest yet at 2.0Ah.

This seems to be quite a spread for apparently identical cells, so I'm
wondering if I'm missing something?!

Thanks for any help.

On a similar note, I bought some Lithium Ion AA batteries from China on
Ebay. They claim to be 2.5 amp hours. Yet a 1 amp charger fills them in
just over an hour. I suspect they lie about the capacity.


Anything over 2000 mAh claimed for an 18650 cell is probably porkies.

Tough Guy no. 1265
Guest

Sun Aug 02, 2015 4:30 am   



On Sat, 01 Aug 2015 21:55:18 +0100, Ian Field <gangprobing.alien_at_ntlworld.com> wrote:

Quote:

"Tough Guy no. 1265" <no_at_spam.com> wrote in message
news:op.x2pgicd5cpfvgl_at_red.lan...
On Sun, 21 Dec 2014 18:26:06 -0000, Ian Field
gangprobing.alien_at_ntlworld.com> wrote:

Having discovered that recycling bins in various shops are a good source
of
lithium battery packs that can be put to various uses, I notice quite a
spread in claimed Ah capacities on the information labels.

The first aquisition was labelled "5.2Ah" - there weren't any parallel
combinations as it contained an uneven number of cells.

The next rescue was marked "4.2Ah", and contained 3 sets of parallel
pairs -
so I assume the individual cell capacity is 2.1Ah.

The next was lowest yet at 2.0Ah.

This seems to be quite a spread for apparently identical cells, so I'm
wondering if I'm missing something?!

Thanks for any help.

On a similar note, I bought some Lithium Ion AA batteries from China on
Ebay. They claim to be 2.5 amp hours. Yet a 1 amp charger fills them in
just over an hour. I suspect they lie about the capacity.

Anything over 2000 mAh claimed for an 18650 cell is probably porkies.


Nitecore sell 2600mAh ones: http://www.nitecore.com/

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