744T and Sony NP-F970 batteries

No problems with my NP-F970 here, in use for several months now. My
Sony AC-V700 does charge faster than the onboard charger, but either
will get the job done.
 >> Stay informed about: 744T and Sony NP-F970 batteries 

the litmus come 1/3 charged from the factory

the internal charger will charge these batteries without problem

check the recorder pins , might be they to thick go in and make contact ,
you have to hear click when the battery totally inserted


--
Oleg Kaizerman (gebe) Hollyland

"Noah Timan" <this_isnot_it.DeleteThis@yahoo.com> wrote in message
news:1134260434.949021.32530@f14g2000cwb.googlegroups.com...
> Having a little conundrum with these batteries, and I remember that
> they were discussed here recently, so I thought I'd ask for a little
> help. I can't seem to connect this battery successfully to the
> machine. The battery reads a voltage of 7.8VDC on a multimeter
> (although it was not charged after opening from the package) and
> appears to be making proper contact with the pins on the 744T, but the
> machine does not seem to recognize the battery at all.
>
> Wondering:
>
> -- Will the onboard charger on the 744T charge these batteries, or do
> they need to first be charged (and subsequently charged) by a separate
> charger?
>
> -- Is it possible that somehow the batteries are not making proper
> contact? I noticed that the Energizer battery that shipped with the
> machine absorbs the pins on the 744T better than I can seem to get the
> Sony batteries to do. However, the contacts all *do* seem to be
> touching on the Sony batteries, and I can't quite figure out how to
> improve the contact. The other end of the battery stops right at the
> retaining pin of the 744T (the infamous battery mount), and I was
> unable to push it in any further without forcing the issue and possibly
> breaking something.
>
> Any and all advice appreciated, thanks!
>
> Regards,
>
> Noah Timan
>
> (working e is my name at e.... link)
>
 >> Stay informed about: 744T and Sony NP-F970 batteries 

I have had an older np-f970 leave its little metal cup on the pin in
the 744t. Apparently the battery had been dropped at some time cracking
the housing slightly right on the corner. This did not effect its use
on a Pd-150 but the tightness of the 744s mounting system caused it to
give up the ghost. Sounds like what I experienced.... At least with
the 744 once you have the battery mounted its not going anywhere...
Jeff C
 >> Stay informed about: 744T and Sony NP-F970 batteries 

"Noah Timan" <this_isnot_it DeleteThis @yahoo.com> wrote in
news:1134260434.949021.32530@f14g2000cwb.googlegroups.com:

> I can't seem to connect this battery successfully to the
> machine. The battery reads a voltage of 7.8VDC on a multimeter
> (although it was not charged after opening from the package) and
> appears to be making proper contact with the pins on the 744T, but the
> machine does not seem to recognize the battery at all.
>
> Wondering:
>
> -- Will the onboard charger on the 744T charge these batteries

Yes, if it is contact.

>
> -- Is it possible that somehow the batteries are not making proper
> contact?

With the symptoms you describe, it just about has to be that the contacts
on the 744T and those of the battery are not making contact. Otherwise the
battery is defective or deeply discharged.

I suggest looking into the battery contacts to see if there is anything
that could be obstructing blocking things. Might also look at the 744T
contacts for foreign material which might by bad luck align with the point
that makes contact with this one.

I have a NP-F970 and use it often with my 722. I also have six other
various L-format batteries, one two and three high stack types. It does
fine with them all.

At 7.8 V measured, your NP-F970 would ordinarily have a substantial
charge, able to run the 744T for hours. However, I've always charged newly
arrived Li-ion cells before use, and it may be that this voltage means
something different on your newly-arrived and not yet charged sample.

When you plug the battery in the recorder, and plug the wall wart in, does
the yellow LED just above and to the right of the PWR button start
flashing? If so the recorder sees the battery and is starting to charge
it. I'd give it several hours before trying to use it, and prefer to wait
until the flashing stops. I think most battery manufacturers specify full
charge before first use. I think it has something to do with the non-
uniform state the different cells get to by self-discharge after long shelf
storage.
 >> Stay informed about: 744T and Sony NP-F970 batteries 

Thanks Peter, and thanks to all who responded.

Peter A. Stoll wrote:

> When you plug the battery in the recorder, and plug the wall wart in, does
> the yellow LED just above and to the right of the PWR button start
> flashing?

It does, and I let it charge until the light was solid, but it still
would not power up. IIRC the LED comes on when a pin 2/3 cable is
connected, regardless of whether or not there is actually a battery
attached, but maybe I am wrong on this.

I do notice that some of the pin is exposed when connected to the
battery, which is not the case with the Energizer L battery that
shipped with the machine (and works fine). However, I could not find a
way to shove it in further without using brute force. From what I
could tell with a flashlight (it's a hard angle to see on the back of
there) the pins were engaged in the battery receptacles.

thanks

nvt
 >> Stay informed about: 744T and Sony NP-F970 batteries 

"Noah Timan" <this_isnot_it.DeleteThis@yahoo.com> wrote in
news:1134353374.777806.216170@g14g2000cwa.googlegroups.com:

>> When you plug the battery in the recorder, and plug the wall wart in,
>> does the yellow LED just above and to the right of the PWR button
>> start flashing?

> It does, and I let it charge until the light was solid, but it still
> would not power up. IIRC the LED comes on when a pin 2/3 cable is
> connected, regardless of whether or not there is actually a battery
> attached, but maybe I am wrong on this.

Noah, I did not believe you, but I just tried it on my 722, and yes indeed
the yellow LED top right of PWR starts up flashing with no battery in the
well. Grumble, can't say I like that much at all.

The next question is whether it would ever stop flashing if no battery were
plugged in. My guess is "no", unless SD put a safety timer in. I'll try
to leave mine in that condition overnight. If it never turns off, and
yours does, then it seems likely you indeed have battery contact--which
would make the defective sample of battery option more likely than the
inadequate battery contact--but still leaves degraded contact a conceivable
possibility. The 7xx pulls substantial current especially during startup.

Peter A. Stoll
retired electrical engineer (but the microprocessor design kind, not the
power systems kind)
 >> Stay informed about: 744T and Sony NP-F970 batteries 

Peter A. Stoll wrote:

> You mentioned that you have a voltmeter. A test that would show whether
> any charging actually happened would be before/after voltage.

It is clear that the machine is not recognizing/charging the battery,
so of course no voltage increase is shown. The question is, why? If
the battery were defective -- and even if so -- it is unlikely the
voltmeter would show a decent reading on it. So it's either that,
regardless, or that the pins are not making contact. If it's the
latter, the next troubleshooting question is this: do the sockets on
the battery visibly cover the pins entirely with the 970 batteries, for
those of you who use them successfully, or is part of the pin still
visible (as it is in my case)?

Thanks!

nvt
 >> Stay informed about: 744T and Sony NP-F970 batteries 

"Peter A. Stoll" <Lyn1Stoll_spamdel DeleteThis @comcast.net> wrote in
news:Xns9729D1AE829CEHaifa10Kulim07Michel@216.196.97.138:

> Noah, I did not believe you, but I just tried it on my 722, and yes
> indeed the yellow LED top right of PWR starts up flashing with no
> battery in the well. Grumble, can't say I like that much at all.
>
> The next question is whether it would ever stop flashing if no battery
> were plugged in.


Well, I'm wrong again. I've only had my 722 with no main battery in the
well plugged in to the wall wart for something like two to four hours and
already the yellow LED has stopped flashing and is on solid. So the
sequence of flashing at first and then going on solid is zero proof that
the battery was ever in contact at all.

You mentioned that you have a voltmeter. A test that would show whether
any charging actually happened would be before/after voltage.

I just now probed four L-type batteries which were in my external charger
sometime in the last few weeks and not used since. Open-circuit, they read
from 8.28 to 8.37 volts among the four. If you put a battery in the unit,
wait threeish hours for the light to stop flashing, and find the battery
voltage (at same temperature--may need to wait an hour or two) unchanged,
and well below 8 V, then I think no charging occured, and the failure to
make contact most likely answer. If, however, an initial voltage in well
below 8V rises after this attempt to charge to more than 8, then it seems
charging really did occur, and thus contact, so more likely the battery
sample is simply defective, and I'd discard it or try to get a replacement
from the vendor.
 >> Stay informed about: 744T and Sony NP-F970 batteries 

"Noah Timan" <this_isnot_it.DeleteThis@yahoo.com> wrote in
news:1134366384.100289.49950@g47g2000cwa.googlegroups.com:


> the next troubleshooting question is this: do the sockets on
> the battery visibly cover the pins entirely with the 970 batteries, for
> those of you who use them successfully, or is part of the pin still
> visible (as it is in my case)?
>

On my 722, my plugged-in NP-F790 leaves about .17 inch of the two "banana"
connection pins exposed to view. It stops travelling just barely after it
clears the depressable stop you depress to release it for removal.

The ER-C520 which shipped with the 722 leaves the same portion of the pin
exposed, (both of the two non-compressible sections--the four-leaved
compressible sections go completely inside the battery).

Peter A. Stoll
 >> Stay informed about: 744T and Sony NP-F970 batteries 

no , its not visible , the pin go inside

"Noah Timan" <this_isnot_it.TakeThisOut@yahoo.com> wrote in message
news:1134366384.100289.49950@g47g2000cwa.googlegroups.com...
>
> Peter A. Stoll wrote:
>
>> You mentioned that you have a voltmeter. A test that would show whether
>> any charging actually happened would be before/after voltage.
>
> It is clear that the machine is not recognizing/charging the battery,
> so of course no voltage increase is shown. The question is, why? If
> the battery were defective -- and even if so -- it is unlikely the
> voltmeter would show a decent reading on it. So it's either that,
> regardless, or that the pins are not making contact. If it's the
> latter, the next troubleshooting question is this: do the sockets on
> the battery visibly cover the pins entirely with the 970 batteries, for
> those of you who use them successfully, or is part of the pin still
> visible (as it is in my case)?
>
> Thanks!
>
> nvt
>
 >> Stay informed about: 744T and Sony NP-F970 batteries