Hi,

Could anyone told me something more about Icom CM-8 battery pack, like
for example:

- voltage (is it 8.4V?)
- capacity (is it 1100 mAh?)
- what is that piece of electronic inside for?
- why it does have 13.8V AND wall charger connector. Could it be
charged both ways?
- why it does have 11 (!?) "strange" cells inside but only (nominal, if
I am right?) 8.4V
- it seems to have thermal and current protection connected in series
with cells (if somebody could confirm this?)

- does anybody, maybe, has a schematic diagram of it?

(I would like to put 7 x NiCd AA cells inside, and I am not sure if
that could be done).

Any info is more than appreciated.

Greetings

Before you do anything... is there are printing on the battery pack lable to
indicate the type of battery used.... eg Li-ion...

Larry ve3fxq


"Zorpetus" wrote in message
oups.com...
Hi,

Could anyone told me something more about Icom CM-8 battery pack, like
for example:

- voltage (is it 8.4V?)
- capacity (is it 1100 mAh?)
- what is that piece of electronic inside for?
- why it does have 13.8V AND wall charger connector. Could it be
charged both ways?
- why it does have 11 (!?) "strange" cells inside but only (nominal, if
I am right?) 8.4V
- it seems to have thermal and current protection connected in series
with cells (if somebody could confirm this?)

- does anybody, maybe, has a schematic diagram of it?

(I would like to put 7 x NiCd AA cells inside, and I am not sure if
that could be done).

Any info is more than appreciated.

Yes, it says NiCd (Nickel-Cadmium).
It is an older battery pack for an older HT - Icom H16 (at that time
Li-ion was Science Fiction :-)

"Zorpetus" wrote:

Hi,

Could anyone told me something more about Icom CM-8 battery pack, like
for example:

The CM-8 is from Icom's commercial line and is equivalent to the BP-8.

- voltage (is it 8.4V?)
Yes.

- capacity (is it 1100 mAh?)
My 1992 vintage reference says 800 mah.

- what is that piece of electronic inside for?
It's the constant-current charge regulator for slow-charging (12-14 hr
charge rate).

- why it does have 13.8V AND wall charger connector. Could it be
charged both ways?
Not sure about that, the Icom wall chargers I have put out nominal
12v., or you can plug any nominal 12v source into the same jack.

- why it does have 11 (!?) "strange" cells inside but only (nominal, if
I am right?) 8.4V
No idea about the number of cells. If it's really an original unit, it
only has 7 cells. Maybe someone has converted it to a higher voltage
with more, smaller capacity cells? Or they're space fillers?

- it seems to have thermal and current protection connected in series
with cells (if somebody could confirm this?)
The pack can be fast charged with the proper drop-in charger. Since
this can generate enough heat to melt things if something goes wrong,
the thermal switch is there to open the circuit if things get too hot.

- does anybody, maybe, has a schematic diagram of it?
Not I. It shouldn't be that hard to draw one out if you're really
interested (I haven't been!).

(I would like to put 7 x NiCd AA cells inside, and I am not sure if
that could be done).
If they fit it can be done :-). I'd think it would be easier to get a
pack that's designed for AA's. Icom's is BP/CM-4, a 6-cell, 7.2v pack.
There are higher voltage AA packs available from third-party vendors.


Roger Grady
To reply by email, remove "qlfit." from address