EDAboard.com | EDAboard.eu | EDAboard.de | EDAboard.co.uk | RTV forum PL | NewsGroups PL

Lithium battery capacities (18650).

Ask a question - edaboard.com

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

Ian Field
Guest

Mon Dec 22, 2014 1:28 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.

jeanyves
Guest

Mon Dec 22, 2014 4:00 am   



On 2014-12-21 19:28:09 +0100, Ian Field said:

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.



hi,

chinese manufacturers are prown to mark everything they want on battery
capacity
between 1 and 2 times the real capacity.
it seems to be a constant from clone batteries
2 Ah for a 18650 battery is a good value to trust.
then there are devices that measure it, it's always a good tool if you
save batteries from trash.

--

Jean-Yves.

Ian Field
Guest

Fri Dec 26, 2014 1:51 am   



"jeanyves" <jeanyves_at_nowhere.com> wrote in message
news:54973504$0$2070$426a74cc_at_news.free.fr...
Quote:
On 2014-12-21 19:28:09 +0100, Ian Field said:

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.



hi,

chinese manufacturers are prown to mark everything they want on battery
capacity
between 1 and 2 times the real capacity.
it seems to be a constant from clone batteries
2 Ah for a 18650 battery is a good value to trust.
then there are devices that measure it, it's always a good tool if you
save batteries from trash.


A capacity tester is probably a long term round-tuit.

The up and running application is an E-cigarette, the cells claiming to be
5.2Ah last a whole day and well into the next (if I forget to change over in
the morning).

There's a 2P3S pack claiming to be 4.2Ah that I'm wondering whether to leave
the parallel pairs intact.

Another round-tuit job is the discount store 5W LED handlamp that keeps self
discharging if I don't leave it permanently on the charger - the information
leaflet claims a 2.2Ah capacity cell.

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

Ask a question - edaboard.com

Arabic versionBulgarian versionCatalan versionCzech versionDanish versionGerman versionGreek versionEnglish versionSpanish versionFinnish versionFrench versionHindi versionCroatian versionIndonesian versionItalian versionHebrew versionJapanese versionKorean versionLithuanian versionLatvian versionDutch versionNorwegian versionPolish versionPortuguese versionRomanian versionRussian versionSlovak versionSlovenian versionSerbian versionSwedish versionTagalog versionUkrainian versionVietnamese versionChinese version
RTV map EDAboard.com map News map EDAboard.eu map EDAboard.de map EDAboard.co.uk map