Searching \ for '[EE] Battery holder for 18650' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/power/batterys.htm?key=battery
Search entire site for: 'Battery holder for 18650'.

Exact match. Not showing close matches.
PICList Thread
'[EE] Battery holder for 18650'
2016\10\13@035903 by Nicola Perotto

picon face
Hi all,
just seen this on ebay. Not even tested.
The seller has different sizes.
"Dettagli su  One 3.6V 3.7V 18650 Li-Ion Battery Holder Case w/1S2P Protect PCM BMS"
USD 7.95
www.ebay.it/itm/One-3-6V-3-7V-18650-Li-Ion-Battery-Holder-Case-w-1S2P-Protect-PCM-BMS-/220775093035?hash=item336738932b:g:d9oAAOSwu1VW2Ovs
            N


-- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
mailman.mit.edu/mailman/listinfo/piclist
.

2016\10\13@054835 by RussellMc

face picon face

On 13 October 2016 at 21:59, Nicola Perotto <spam_OUTnicolaTakeThisOuTspamnicolaperotto.it> wrote:

> https://www.aliexpress.com/18650-case-pcm_reviews.htmljust seen this on
> ebay. Not even tested.
> The seller has different sizes.
> "Dettagli su  One 3.6V 3.7V 18650 Li-Ion Battery Holder Case w/1S2P
> Protect PCM BMS"
> USD 7.95
> www.ebay.it/itm/One-3-6V-3-7V-18650-Li-Ion-Battery-
> Holder-Case-w-1S2P-Protect-PCM-BMS-/220775093035?hash=item336738932b:g:
> d9oAAOSwu1VW2Ovs


​LiIon battery holders need to be treated with due care if being used with
high current discharge. Contact resistance may matter.
Cells must not have PCM inside already.

While that says PCM BMS in the title, they are not the same thing.
PCM aims to prevent major disaster.
BMS ensures [tm] proper charging and maybe discharge.
Both MAY be incorporated, but mau\y not be.

The source is ex China, free shipping, so comparable to eg AliExpress
offerings.
So. Shop around. But, Caveat Emptor, as ever.


FS = free shipping EMS std to NZ (so probably most places)(some say
"worldwide")


​___________________​

US7.31. FS 2S1P visually the same.
www.aliexpress.com/item/One-3-6V-3-7V-18650-Li-Ion-Battery-Holder-Case-w-1S2P-Protect-PCM-BMS/32623497572.html
Reasonable specs given considering.
May even be true.
They expect a proper exxternal charger.
Overcharge 4.4 to 4.35V
OC release 4.05 - 4.1V

Ichg limit 10A (or maybe Idischg?)

LV cutout 2.45 - 2.55 V

Same $7.31 FS
https://www.aliexpress.com/store/product/One-3-6V-3-7V-18650-Li-Ion-Battery-Holder-Case-w-1S2P-Protect-PCM-BMS/1720416_32623497572.html


​1S4P & ​
2s2P: $9.15,
​ ​
​3S1p: $9.99
4S1P $10.99 , 2 x $17.85,
2S1p or 1S2P $7.31

https://www.aliexpress.com/18650-case-pcm_reviews.html


Somewhat less, various, FS
eg 1S4P $7.20
http://chinaprices.net/buy-1s4p-18650-7v-holder-case-battery-li-ion-pcm-protection-circuit-module-1s4p-7v-18650-fasttech--fasttech-7A0B71388


​
​etc
​



​
--
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
mailman.mit.edu/mailman/listinfo/piclist

2016\10\13@074001 by RG

picon face
Hi,
but I think that the greater Li-on 18650 cells problem is battery itself.

They have usually  half of the capacity declared.

2016-10-13 11:59 GMT+02:00 Nicola Perotto <.....nicolaKILLspamspam@spam@nicolaperotto.it>:

{Quote hidden}

-- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
mailman.mit.edu/mailman/listinfo/piclist
.

2016\10\13@084113 by RussellMc

face picon face

On 13 October 2016 at 23:39, RG <renzogiugspamKILLspamgmail.com> wrote:

> Hi,
> but I think that the greater Li-on 18650 cells problem is battery itself.
> They have usually  half of the capacity declared.
>
> ​Only the junk ones :-).

Brand name batteries with a reputation to maintain from legitimate ​

​sources will operate as specified. ​
an eg Panasonic 18650 LiIon cell will have around 3000 mAh of current
capacity.

An eg XXXXFire cell if genuine, or if not genuine, or whether or not
genuine ones exist, may be marked 4000 mAh and have perhaps 2000 mAh
capacity, for a while, perhaps.

I have noted that "after market" LiIon camera batteries (typically 2 cells,
7.2V nominal) for brand name cameras seem to have lower lifetimes than
older aftermarket batteries. Whereas genuine older versions soldier on for
far far longer than I would have expected.

Old originals are so good compared to new 'clones' that I'm considering
repacking some cells into new style clone housings to fit my present main
camera.


         Russell
--
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
mailman.mit.edu/mailman/listinfo/piclist

2016\10\13@095025 by Denny Esterline

picon face
I've been on this particular soap box before....
I've purchased and tested every 18650 holder I could buy though "normal
distribution" (Mouser, Digikey, Allied, etc) I have a box around here
somewhere with the wreckage of at least 20 versions.
After testing I've come to a simple conclusion - I will _not_ put any of
them in my production products.

Each have their own issues, but the one I seen over and over again is that
the housing grips the cells so tight that the spring tabs cannot move the
cell. The resulting failure is that a little bump or hit can slide the cell
away from one end and break contact, since the compressed contact cannot
overcome the holder's friction, the product remains dead.

I'm currently planning to tab weld the cells (more likely have a supplier
do it) and debating soldering the tabs directly to the PCB, or a pigtail+
wire to board connector.

-Denny
-- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
mailman.mit.edu/mailman/listinfo/piclist
.

More... (looser matching)
- Last day of these posts
- In 2016 , 2017 only
- Today
- New search...