A Q 4 T1

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Greynomad
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A Q 4 T1

Post by Greynomad »

T1,

As the Li-Ion battery guru, can you tell me what the 'T' terminal is for on my camera battery?
Li-Ion battery.jpeg
(I know what the '+' and '-' terminals are... :roll: )
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T1 Terry
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Re: A Q 4 T1

Post by T1 Terry »

Temperature, probably a closed contact thermistor that goes open contact if it senses a cell over heat and this stops the charging. If a cell goes short circuit or gets overcharged compared to the others, that cells temperature rises rapidly. Sadly, there is only one thermistor in there, so it isn't designed to protected the cells. it is designed to stop it turning into a fire cracker wit cells exploding and shooting across the room with a rocket flame behind it. Quite a spectacular show that can be watch on a link I put up about the risks of using the Tesla cells for a home power battery if you don't use the rest of the BMS system and cooling system.

The 3.7v nom. cell voltage indicates it is one of the lithium compounds that DOES generate oxygen when overheated. The cells that do not generate oxygen internally have a nom. voltage of 3.2v (LiFeP04) or 2.3v nom. for LTO cells.
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Greynomad
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Re: A Q 4 T1

Post by Greynomad »

So, as this one no longer holds a charge, and needs to be replaced, how do I "dispose of properly" :?: :?
I have a leaf-litter fire going in the back yard at the moment... :P :roll:
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T1 Terry
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Re: A Q 4 T1

Post by T1 Terry »

Greynomad wrote: Fri May 24, 2019 3:55 pm So, as this one no longer holds a charge, and needs to be replaced, how do I "dispose of properly" :?: :?
I have a leaf-litter fire going in the back yard at the moment... :P :roll:
Well, that would turn it into a spectacular bonfire :lol: Can you see how to open it up? Are there screws or is it glued together?
A person may fail many times, they only become a failure when they blame someone else John Burrows
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Greynomad
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Re: A Q 4 T1

Post by Greynomad »

Looks like snap-in tabs & slots. Probably glued as well, as I can’t separate the casing.
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Ray
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Re: A Q 4 T1

Post by T1 Terry »

Pity, it will only be one cell causing the problem and could easily either be fully recharged or replaced if it is seriously damaged.
A person may fail many times, they only become a failure when they blame someone else John Burrows
If we have data, let’s look at data. If all we have are opinions, let’s go with mine. – Jim Barksdale, former Netscape CEO
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Greynomad
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Re: A Q 4 T1

Post by Greynomad »

Well, I ordered two replacement batteries on the www.
They cost half what the local (Albury) camera shop was charging!
(That's why I bought two. 8-) )
They arrived today.
Talk about over-packaging!!!
Mailing envelope. OK, that's necessary.
Two cardboard boxes. OK on them.
Inside, two plastic bags.
Inside each bag, a plastic box.
Inside each box, a battery, with a cling-sheet of plastic... which appeared to serve no practical purpose, as it did not cover the terminals! :shock:
Perhaps they were there to keep the plastic battery cases shiny until I use them. :roll:
Overpackaging.JPG

:roll: Dunno why, but it's upside-down :?: :?:
Bruce, can you fix this, please?
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Ray
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"Insufficient data for a meaningful answer."
Isaac Asimov, "The Last Question"

"I refuse to drink water, because of the disgusting things fish do in it"
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BernieQ2
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Re: A Q 4 T1

Post by BernieQ2 »

Me again .
Overpackaging.JPG
Bernie .
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Re: A Q 4 T1

Post by BruceS »

Showing off again Bernie?!!
Punishment will be administrated by Dot shortly...............
Did you see the stickers on the rear of the bus? lol
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Vik351
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Re: A Q 4 T1

Post by Vik351 »

BruceS wrote: Mon Jun 03, 2019 3:17 pm Showing off again Bernie?!!
Punishment will be administrated by Dot shortly...............
Did you see the stickers on the rear of the bus? lol
"Honk if you'r horny"...???

vik... :o :shock: :?
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