Verifying a 14500 battery is protected?

[satoshi]

I have some Ultrafire 14500 batteries, which do not actually say the word 'protected' on them, and in fact, have a spelling and grammatical error:

"The voltgae of full charge and empty condition is 4.2V and 2.75V, Respectively. It is dangerous to heat, Throwing into fire or charging reversely."

They say "LC 14500 900 mAh 3.6V"

Does that mean it's protected? What does 'LC' indicate?

 

[mistinthewoods]

I got some grey ones that came with my 905 that I don't think were protected. The reason I think that is that my protected Trustfires have a PCB on both ends that you can feel under the wrapper. The grey ones just have a PCB on one end.

 

[satoshi]

Yeah, this said protected on the site I bought them from and I see other people on here using what at first glance looks like the same battery? Mine are gray also.

 

[mistinthewoods]

What site? Is it a reputable one?

 

[satoshi]

Ultrafire 14500 Protected Rechargeable Lithium Battery

bought a box mod there and I'm charging the batteries now.

looks identical to the madvapes one everyone else sells

 

[mistinthewoods]

Yeah, I can see the circuit boards on both ends in the pic.

 

[satoshi]

ok so it's all good? thanks.

 

[Shortstuff116]

I've posted the below link before and you may find it helpful and informative:

Protected Batteries

 

[mistinthewoods]

I've posted the below link before and you may find it helpful and informative:

Protected Batteries

I been schooled! Thanks

 

[Drozd]

yeah the link that shortstuff posted....

in short theres the little crimp/indent at the top....and the little crimp/indent on the bottom....and the strip running down the side of the battery that you can see/feel...

this translates to the PTC on the positive end, the PCB on the negative end and the strip that connects them..
PCB handles the overcurrent, undercurrent protection and can be reset..
PTC handles the thermal/overtemperature and overpressure protection and physically fails and breaks the connection between positive and negative terminals (the strip) and can vent gas (the vents in the button top)...and cannot be reset..

 

[mistinthewoods]

Yup, that's kinda what I was trying to say in post#2. Didn't know how it all worked though. Kinda cool to see the entire anatomy.