please identify these things

[Matthias Benkmann]

I've got 2 components I can't identify. Each comes from a different
rechargeble battery pack.
The first one is in a black transistor casing but with only 2 legs. It
is marked N25 L.
The second one is in a long metal casing (also 2 legs) an is labeled
IP305AF 80C
ISUZU 3B5

I've checked them with a multimeter and they're not diodes, simple
resistors or capacitors. What could they be ? Fact is that the device
I got one of the battery packs from won't recharge if the thingy is
removed. Please help if you can. Thanks. MSB

[Carl Smith]

In article <36ab6b29...@news.lrz-muenchen.de>, mben...@gmx.de
says...

> I've got 2 components I can't identify. Each comes from a different
> rechargeble battery pack.
> The first one is in a black transistor casing but with only 2 legs. It
> is marked N25 L.
> The second one is in a long metal casing (also 2 legs) an is labeled
> IP305AF 80C
> ISUZU 3B5

The second one is probably a thermal fuse, there to open the circuit
if the battery pack overheats. I figure that because of the 80C
marking, which would mean that it trips at a temperature of 80 C.

The first one in a transistor case might also be a temperature
sensor of some sort.

-
Carl Smith
cds...@pionet.net

[mul...@hotmail.com]

>-The first one is a fuse about 800ma I think..But please check rating
regards Martin
> Carl Smith
> cds...@pionet.net

[Evan Coutts]

Matthias Benkmann wrote:
>
> I've got 2 components I can't identify. Each comes from a different
> rechargeble battery pack.
> The first one is in a black transistor casing but with only 2 legs. It
> is marked N25 L.
> The second one is in a long metal casing (also 2 legs) an is labeled
> IP305AF 80C
> ISUZU 3B5
>

> I've checked them with a multimeter and they're not diodes, simple
> resistors or capacitors. What could they be ? Fact is that the device
> I got one of the battery packs from won't recharge if the thingy is
> removed. Please help if you can. Thanks. MSB

gday,
from what ive seen, the component in question is a thermistor. it is
connected to two extra contacts on the battery pack and is monitored by
the charge circuitry. if the batteries become too hot while charging,
the charger will allow them to cool. they may also be involved in
calculating whether the battery is under an excesive load or chraged to
its maximum, but on these two pionts im not shure.

catcherlater,
evan coutts.
e...@alphalink.com.au

[Sam Goldwasser]

Not in this case I believe. The first is a fast acting fuse (actually called
an IC protector) and the second is a thermal fuse. Both of these should read
0 ohms if good.

The thermister thingies usually look like tiny diodes or caps.

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[Evan Coutts]

gday,
yep, that's a good idea. could be true as well.i think its baisicly
agreed that theyre funtion is trhermal regulation of the batteries.

catrcherlater,
evan coutts.
e...@alphalink.com.au

[Matthias Benkmann]

On 25 Jan 1999 13:23:30 GMT, s...@stdavids.picker.com (Sam Goldwasser)
wrote:

>Not in this case I believe. The first is a fast acting fuse (actually called
>an IC protector) and the second is a thermal fuse. Both of these should read
>0 ohms if good.

You're right about the 0 ohms and it sounds reasonable to put some
kind of a fuse in there. But I still don't understand why the battery
pack wouldn't work without it. However, I have to say that it was not
me but my father who experimented with it, so I can't actually swear
it was done correctly. Thanks anyway to all who answered. MSB