How to see if a battery is protected

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light-wolff
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Allmaybe wrote:
Will the added protection board cause difference in diameters?

Some (like Soshine) have their protection on the positive pole and only one wrapper layer. Such cells have the same diameter as unprotected cells.
mattjk
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Want to see if its protected? Short it with 10 gauge or similar cable if it gets really hot or blows up its probably not protected. If it does nothing it probably has a protection circuit.

Hunter
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mattjk wrote:
Want to see if its protected? Short it with 10 gauge or similar cable if it gets really hot or blows up its probably not protected. If it does nothing it probably has a protection circuit.
Shocked
or just send them to mattjk so he could test them by shorting + a – !!!
If he answers after testing = its protected,
if no answer for 24 h or more = it’s not protected and he is in hospital waiting for skin grafting…
light-wolff
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mattjk wrote:
Want to see if its protected? Short it with 10 gauge or similar cable if it gets really hot or blows up its probably not protected. If it does nothing it probably has a protection circuit.

Unprotected cells with PTC won’t heat up cables because they limit short circuit current (but I don’t know what “10 gauge” means).
mattjk
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gauge (AWG) is the measure the yanks use for the cable size. 10 is good for about 50 amps depending on length

And yes i was obviously kidding!

Dimbo The Blinky
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Actually, Sony did that when they were conducting the required Engineering Testing when they invented these batteries. Not with wire, but with a “dead short rig”.

Those early batteries must have been made better than the “modern” ones, since all they did was discharge to some low-low voltage & get hot.

So, all the fear-/belief-based hype and hysteria is great fun, but reality has a tendency to be far more boring.

“There is no darkness but ignorance.”

HKJ
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Dimbo The Blinky wrote:
Those early batteries must have been made better than the “modern” ones, since all they did was discharge to some low-low voltage & get hot.

You forgot “vent”, this will often happen when batteries gets hot and it is only a problem if there is a spark.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Dimbo The Blinky
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HKJ wrote:
You forgot “vent”, this will often happen when batteries gets hot and it is only a problem if there is a spark.
Uh, no, I merely quoted their publication of their results. And they also recorded the actual highest temperature (I would say “QUITE hot”) and the fact that there was no venting or bulging or other failure.

The only evidence I can find of “venting” (with or without flames) is on youtube videos, where the actual rigs used to create the desired result are poorly or falsely “documented”. Which is why your measurements, HKJ, are so vital to posterity.

“There is no darkness but ignorance.”

HKJ
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Dimbo The Blinky wrote:
HKJ wrote:
You forgot “vent”, this will often happen when batteries gets hot and it is only a problem if there is a spark.
Uh, no, I merely quoted their publication of their results. And they also recorded the actual highest temperature (I would say “QUITE hot”) and the fact that there was no venting or bulging or other failure.

Usual tests are passed with “no flames and no explosion”, i.e. venting is acceptable.

I have had a few batteries vent during test when they got too hot and when I notice the venting I include the information in the review, but my guess is that I have missed some vents (They are not dramatic in any way).

I forgot to say: Except if they happens in a airtight flashlight.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Allmaybe
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Thank you for explaining.

For quicker, easier and safer charging.

www.allmaybe.com
https://www.facebook.com/allmaybeCN

amycheung
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Awesome …thank you so much HKJ!

amycheung
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light-wolff wrote:
mattjk wrote:
Want to see if its protected? Short it with 10 gauge or similar cable if it gets really hot or blows up its probably not protected. If it does nothing it probably has a protection circuit.
Unprotected cells with PTC won't heat up cables because they limit short circuit current (but I don't know what "10 gauge" means).

Here is more information of gauge and voltage drop for your reference.

huntking
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Very professional post. I learn.

Ultrafire.Spain
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Hola a todos
Iniciamos nuestra aportación en este foro.
En principio si se nos permite lo haremos en Español para los usuarios de habla hispana y el ingles

Conocéis las nuevas baterías de UltraFire?
Estas a diferencia de las tradicionales protegidas, el PCM/BMS de protección se encuentra en el polo positivo, la ventaja es que esta ya no tienen la típica cinta de cobre que conecta el polo positivo con el PCM.

Hello everyone
We started our contribution in this forum.
In principle, if we are allowed, we will do it in Spanish for Spanish-speaking users and in English

Do you know the new UltraFire batteries?
Unlike traditional protected PCM / BMS protection is in the positive pole, the advantage is that they no longer have the typical copper ribbon that connects the positive pole to the PCM.

Nos presentamos. UltraFire España s.l. Estamos en España en la provincia de Alicante

Tenemos una plataforma de presentación y venta de productos. www.ultrafire.es

Somos distribuidores de la marca UltraFire para Europa

Nuestra intención es poder llegar a todos los usuarios de habla hispana en el mundo.

Informar de las novedades de la marca y denunciar las falsificaciones que habitualmente se vende en Europa.

Gracias por dejarnos participar en este foro.

snakebite
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i doubt anyone here cares about ultrafire batteries with blatant lies on the label.
other than to point at them to show others what to avoid.

Jack Kellar
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snakebite wrote:
i doubt anyone here cares about ultrafire batteries with blatant lies on the label.
other than to point at them to show others what to avoid.

Pretty much, yes.

JacksonMiller
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Thank You for information

firedome
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Great info! Thumbs Up

“We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light.

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