Determine mAh

[Phil Allison]

"miso" = MORON

I don't recall the OP asking ...

** Here is the Q, you smartarse pile of sub human dung:

" Is there a way to determine if a camera battery that ouputs 7.4 V really
has a 1900 mAh rating instead of a 1000 mAh ? "

Then in the next post:

" I have a Sunwa YX-360TR but it does not have that feature."

The Sunwa is a very basic, analogue multimeter.

Even an autistic **** & TOTAL MORON like YOU should to see he is no
electronics expert and is NOT able do follow your insane advice.

Whoever you fucking are, you have no excuse, no fucking clue and no honesty
at all.

FYI:

YOU should have been fucking aborted.




..... Phil

 

[miso]

What's the matter? Is your cellmate not routing you? Is that why you are
so cranky?

 

[Martin Brown]

10 ohms??? Are you outta your mind, that would be almost 0.8A. Just about every battery, regardless of technology, specs the capacity, C, at load current of 0.1C. He needs to load it with 1900 mAH/10=190 mA. For 7.4V terminal voltage, which as Miso stated is realy 6x 1.2=7.2V, he needs 7.2V/0.19A= 37.89473684 ohms! That's 36-39 ohm nominal resistance to you. Then Prating=0.19 x 7.2= 1.368W = 5W nominal to you.

He might be a little bit on the low side at 6.8R, but it is probably
close to a realistic simulated load for a video camera. Most of these
batteries will easily handle 1C discharge rates without much noticeable
loss of capacity 5-10% and only modest heating.

Manufacturers specs are done on the most flattering discharge profile
and what matters to the OP is how it behaves under a realistic load.

The only caveat for doing a battery test is monitor it and stop the test
when the terminal voltage falls below number of cells volts. Otherwise
the weakest cell in the stack could be damaged by the others if you
forget and leave it connected overnight for instance.

 

[[email protected]]

He might be a little bit on the low side at 6.8R, but it is probably

close to a realistic simulated load for a video camera. Most of these

batteries will easily handle 1C discharge rates without much noticeable

loss of capacity 5-10% and only modest heating.



Manufacturers specs are done on the most flattering discharge profile

and what matters to the OP is how it behaves under a realistic load.



The only caveat for doing a battery test is monitor it and stop the test

when the terminal voltage falls below number of cells volts. Otherwise

the weakest cell in the stack could be damaged by the others if you

forget and leave it connected overnight for instance.



--

Regards,

Martin Brown

Right but the point is the camera manufacturer has already done the work oftesting the camera performance using the specified battery capacity and chemistry. All the user has to do is match up the battery specs. I found thiscircuit in about 100 milliseconds and it's not half bad for testing these little batteries (you might need better compensation on IC1A since the IRL3103 is presenting over 100pF loading - dunno what saved him here ).
http://www.edn.com/design/analog/4368112/Circuit-measures-battery-capacity

 

[George Herold]

He might be a little bit on the low side at 6.8R, but it is probably
close to a realistic simulated load for a video camera. Most of these
batteries will easily handle 1C discharge rates without much noticeable
loss of capacity 5-10% and only modest heating.
Manufacturers specs are done on the most flattering discharge profile
and what matters to the OP is how it behaves under a realistic load.

The only caveat for doing a battery test is monitor it and stop the test
when the terminal voltage falls below number of cells volts. Otherwise
the weakest cell in the stack could be damaged by the others if you
forget and leave it connected overnight for instance.

--

Regards,

Martin Brown

I've used Phil's technique for testing/ matching cells. From the practicalstandpoint, (unless you have an automated system and are doing this for a living), no one wants to take ten hours of data. One hour while I watch some nature program on 'tube' is just fine... especially for a ~10% measurement. As you say it's also good to test with loads similar to the real use.

George H.

 

[[email protected]]

On Tuesday, November 12, 2013 10:25:45 AM UTC-5, George Herold wrote:

You're just acting out a fantasy when you do stuff like that, it will be a time travel machine next.

 

[[email protected]]

Keep your day job.

I will. However, the question was asked and answered. Do learn to
read.

 

[Phil Allison]

"George Herold"


I've used Phil's technique for testing/ matching cells. From the practical
standpoint, (unless you have an automated system and are doing this for a
living), no one wants to take ten hours of data. One hour while I watch
some nature program on 'tube' is just fine... especially for a ~10%
measurement. As you say it's also good to test with loads similar to the
real use.

** Halleluiah.

Someone who has actually done discharge tests and knows a few things.


.... Phil

 

[Phil Allison]

<[email protected]

You're just acting out a fantasy when you do stuff like that, it will be a
time travel machine next.

** You are completely insane.

**** off or get booted off .

You stinking MORON

 

[Phil Allison]

"miso"

YOU should have been fucking aborted.

**** off ASSHOLE !!!!!

 

[[email protected]]

On Tuesday, November 12, 2013 7:42:45 PM UTC-5, Phil Allison wrote:

Not in a real good mood after stocking grocery shelves all night, nitwit? That's all you're good for...and just barely...wouldn't trust you to jump a car battery without screwing it up.

 

[Phil Allison]

<[email protected]>


** Go get fucked you TENTH witted pile of stinking LYING dung.

Then get cancer and DIE !!

 

[[email protected]]

On Tuesday, November 12, 2013 7:51:55 PM UTC-5, Phil Allison wrote:


Sounding more and more like your last gasp...looks like life is finally catching up with you.

 

[Phil Allison]

"Martin Brown"
( snip lunatic shite from criminal troll )

He might be a little bit on the low side at 6.8R,

** Not at all.

If the pack is 1Ah, then discharge to 1V per cell will take about 1 hour.

If the pack is 1.9Ah, then it will take nearly two hours.

Rates of 1C and 0.5 C are tame.

Rates up to to 10 or even 20C are used by RC hobbyists with around 75%
capacity achieved.

Most of these batteries will easily handle 1C discharge rates without much
noticeable loss of capacity 5-10% and only modest heating.

** Correct.

As all the published discharge curves show.

Manufacturers specs are done on the most flattering discharge profile and
what matters to the OP is how it behaves under a realistic load.

** Correct.

Terminal cases of pedantry will not let the resident lunatics see that.

The only caveat for doing a battery test is monitor it and stop the test
when the terminal voltage falls below number of cells volts. Otherwise the
weakest cell in the stack could be damaged by the others if you forget and
leave it connected overnight for instance.

** Correct again.


..... Phil

 

[miso]

"George Herold"


I've used Phil's technique for testing/ matching cells. From the practical
standpoint, (unless you have an automated system and are doing this for a
living), no one wants to take ten hours of data. One hour while I watch
some nature program on 'tube' is just fine... especially for a ~10%
measurement. As you say it's also good to test with loads similar to the
real use.

** Halleluiah.

Someone who has actually done discharge tests and knows a few things.


... Phil

You are a fucking idiot. It is simple to set up capacity checking in a
lab. DC electronic loads are easy to build. It is a reference, an op
amp, and a fucking power fet. A comparator is used to turn off the cheap
mechanical clock. Doing two dozen tests at a time is no big deal if you
need the data. This is especially true when determining the
effectiveness of top off schemes.

It is OK to be a shitty engineer. But don't dis people that do it right,
just because you can't do it.

 

[miso]

Hint: some batteries do not meet their published curves.

There is a reason Panasonic bought Sanyo battery technology. More than
that will probably get me sued.

 

[miso]

"miso"

YOU should have been fucking aborted.

**** off ASSHOLE !!!!!

Do you like it when your cellmates route you in both your anus and
mouth? Do you let the guards watch?

 

[Phil Allison]

"miso"


** FOAD you STINKING NUT CASE TROLL

Never post here again.

Or this NG will be sabotaged

 

[Phil Allison]

"miso"

** FOAD you STINKING NUT CASE TROLL

Never post here again.

Or this NG will be sabotaged.

 

[Phil Allison]

"miso"

** FOAD you STINKING NUT CASE TROLL

Never post here again.

Or this NG will be sabotaged.