battery id

[dj_ricoh]

does someone know how they are called?
I need to buy a few. I notice lots of devices are using them
Even in headphones but those ones are a little bigger.
This is one very tiny <3

Ty

[Andrew F. Ali]

Re: battery id

Looks like it has a [plastic casing. Open it and take a look. Might have a cell with an ID.

[eccerr0r]

Re: battery id

Actually don't bother opening it if it is what I think it is, you'll just get a mess. It looks like a rechargeable lithium ion polymer "pouch" cell. You buy them by the dimensions and unfortunately likely you'll have to get the right size which may be hard as there are no generics and likely many are off a millimeter or so on some dimension. There should be a set of numbers printed on it indicating the size which is basically in millimeters in each direction, else you'll have to deflate and measure it...

[stj]

Re: battery id

yes, li-po cell with a protection board under the kapton tape.

[Andrew F. Ali]

Re: battery id

Very interesting.....I've never seen one.

[sam_sam_sam]

Re: battery id

does someone know how they are called?
I need to buy a few. I notice lots of devices are using them
Even in headphones but those ones are a little bigger.
This is one very tiny <3

Ty

You MUST check every cell you buy to see if the protection boards work right

Be very careful when buying these on eBay a lot of these are China made cells
There quality is mixed sometimes you get good cells but the other problem is with the protection board this is a mix of quality as well

Here is an example of what I mean

One thing you might notice is

One when changing the voltage at the cell does NOT go over 4.2 volts per cell
the other thing watch for is that the protection board shuts off the power when the battery voltage goes below 2.8 volts to 3.0 volts

What I have seen is that the cut off voltage is some time high than 4.2 volts @ 50 millimeters if it keeps going higher than this do NOT use this protection board

Also you will find some protection boards that with a 50 millimeters loads and below
do not turn off with this current until way below 2.8 volts

Another problem you will sometimes time see is that let say the board is rated at one amp which is supposed to mean that if you over load this it should TRIPs I have some time seen that this dose not always work or you can not even get it close to one amp before it trips

One way you can tell a cell is going bad is when you are charging it and the charging light does not change colors or does not go off or the running time is a lot shorter

Make sure when you buy these types of cells that you test the protection and make sure that they work right

One note if you are VERY careful you can unsolder the protection board and use it on your new cell if the protection board on the new cell does not work right I have had to this before in a tablet because the protection board on the new cell did not work right

If you do have to remove the protection board from a cell use a popsicle stick or a tooth pick
to remove the battery leads from the protection board when unsoldering it for safety reasons
be VERY careful with the positive lead on these cells it is very easily toren off if this happens you will not be able to use this cell again unless you have enough of a lead left and have a battery spot welder if you do have a spot welder do not use a lot of current to weld them with a longer lead to soldier to the success rate of doing this this s about 30%

I hope this helps you

[sam_sam_sam]

Re: battery id

does someone know how they are called?
I need to buy a few. I notice lots of devices are using them
Even in headphones but those ones are a little bigger.
This is one very tiny <3

Ty

Here is eBay link to where you buy some


https://www.ebay.com/itm/10-x-3-7V-3...IAAOSwNuxXa5hV

[NeedsMoreFlux]

Re: battery id

Ebay will have them. search by mah if you cant figure out the size in metric.

I've pulled alot of these out and put in bigger batteries.

They are probably lithium ion.

This looks like an 80-150mah.

[dj_ricoh]

Re: battery id

Can't wait for payday. I have 2 Bluetooth headphones and one small 640x480 camera.


Never had something like this.
Do they have memory or I can charge them willy nilly?

[Techgeeky]

Re: battery id

yes, li-po cell with a protection board under the kapton tape.

Looking them for the first time in my life.

[eccerr0r]

Re: battery id

Do they have memory

No

or I can charge them willy nilly?

Yes, if you want them to explode
No. You can't. I don't think they have protection boards for batteries that small, it's likely on the device that it's connected to so that it won't blow up.

[dj_ricoh]

Re: battery id

Here is eBay link to where you buy some


https://www.ebay.com/itm/10-x-3-7V-3...IAAOSwNuxXa5hV

that is so sick! >

if i keep them do they go bad? like they won`t work after one year if i don`t use them.

[eccerr0r]

Re: battery id

Did you do LiPo-suction on that dead bloated battery so that you can measure it? (badam-tish)

Wow, only 30mAh capacity? A CR2032 is around 180mAh (if only it were rechargeable...)

[stj]

Re: battery id

there are rechargeable versions, i think they are lithium,thionyl-chloride.

[sam_sam_sam]

Re: battery id

that is so sick! >

if i keep them do they go bad? like they won`t work after one year if i don`t use them.

If you keep an eye on them another words every 3 month or so check there voltage if they are close to 3.0 put the on charge until come back up to 3.6 and good to again

I have some for a couple years now and they are still good but still need to check the batteries and protection boards to make sure they work right

I found a a couple of batteries that have gone bad they started to heat up while charging this tells me that have come to end of there useful life

[eccerr0r]

Re: battery id

there are rechargeable versions, i think they are lithium,thionyl-chloride.

The rechargeable CR2032 (LiR2032?) capacity is just as bad as these cells here.

I suppose it depends on what you use the device for; but for things like CMOS clocks that don't charge the battery, I don't think the rechargeable CR2032 is a viable option, they'd require more effort to recharge and replace as it'd need to be done more often.

In fact I'm not sure what the value of those 40mAh rechargeable CR2032s are, can't really think of something that could take 1/4th the capacity that will self discharge much faster than primary lithium-manganese CR2032 cells - means more frequent disassembly, unless they were designed with the rechargeable nature in mind to begin with. In that case they might well use those pouch cells.

[stj]

Re: battery id

the lithium-thionyl are often used to back the cache-ram on raid controllers.

those li-po pouches are short life'd and dangerous.
they also inflate when they are worn-out with enough pressure to damage the thing they are in - including forcing the aluminium battery casing apart on crapple laptops!

[eccerr0r]

Re: battery id

I have a lithium thionyl chloride cell in my Tek 'scope that I retrofitted in. It's 3.6V however - just a hair under a Li-ion, and has fairly high capacity and shelf life hence great for the low power SRAMs used as NVRAM for the calibration memory. The cell is rated for some 2Ah (14500 sized, so 7.2Wh in an AA-sized package is pretty dense) but its internal impedance is so high that it's only good for using as memory backup... Plus can't recharge it...

[stj]

Re: battery id

i have one of those in the GPIB interface of a big bench psu.