Page 14 of 28 FirstFirst ... 410111213141516171824 ... LastLast
Results 131 to 140 of 273
  1. Collapse Details
    Senior Member
    Join Date
    Feb 2010
    Posts
    908
    Default
    Quote Originally Posted by g.l View Post
    The extra pins on official batteries are only there to authenticate the battery is genuine, an attempt by Panny to lock our 3rd party batteries.
    That's absolutely untrue.

    The extra pins are serial communication for SBS battery status alerts and for the thermistor (tracks cell temperatures for safety and proper charging). 3rd party batteries do not handshake with the camera body nor provide GasGauge functionality. That's why you don't get the battery life indicator on screen, because the battery life info is coming from the authentic battery, not the camera. The charger is not a smart charger as per SBS specifications. It's just a columb counting circuit that watches charge rates and temperature over time. that's why it will charge a dumb battery like the 3rd party batteries.

    3rd party batteries offer nothing more than a DC source and rudimentary safety features(over/under voltage and temperature cutoffs). That's it. Because of this, I'd expect their functional lifetimes to be lower than an authentic battery due to rather poor (dis)charge cycle regulation.

    Now for some interesting information:

    A lot of the 2nd and 3rd level Smart Battery charging ICs use the presence of the thermistor to sense if there is a battery installed. It would be interesting if someone would measure power consumption with and without 10k ohms between the T pin and ground to simulate battery presence to see if the camera changes power conservation modes or not.
    Last edited by Svart; 05-23-2011 at 12:18 PM.


    Reply With Quote
     

  2. Collapse Details
    Junior Member
    Join Date
    May 2011
    Posts
    16
    Default
    Why not open up a panasonic battery, take out the cells, and hook a larger battery into the circuit where the original cells were? Would this not provide the correct functions on the "extra" pins (whatever their function is)? Use an SMPS to tune the larger battery to what the original internal cells output. An expensive adaptor (cost of original battery plus a cable, SMPS, and whatever lipos/nimh/etc. you were using), but it would be "doing right" by the camera, no?


    Reply With Quote
     

  3. Collapse Details
    Senior Member keylight's Avatar
    Join Date
    Jun 2010
    Location
    US, Asia
    Posts
    1,113
    Default
    Quote Originally Posted by B3Guy View Post
    Why not open up a panasonic battery, take out the cells, and hook a larger battery into the circuit where the original cells were? Would this not provide the correct functions on the "extra" pins (whatever their function is)? Use an SMPS to tune the larger battery to what the original internal cells output. An expensive adaptor (cost of original battery plus a cable, SMPS, and whatever lipos/nimh/etc. you were using), but it would be "doing right" by the camera, no?
    Since Panasonic batteries are so hard to come by, I think it's a tough thing to sacrifice a functioning battery for this. I'm also not sure how one would hook up a larger battery (with 2 leads) to the four pins on the case, or how you would then go about safely charging the battery.

    I have yet to see a photo of the pins on a DCC8, but I seem to recall reading somewhere (on this site?) that there were only 2 pins on the adapter. If anyone has a DCC8 and can take a photo the pins (and as a bonus, would be willing to crack it open and take a photo of the internal wiring) I think we might be able to answer some of the remaining questions.

    What I don't get, is why some of those big ebay vendors don't make and sell their own version of the DCC8 - other than legal issues of course (not that this stops them from making batteries).


    Reply With Quote
     

  4. Collapse Details
    DVXuser Sponsor adolgin's Avatar
    Join Date
    May 2004
    Location
    Lexington, USA
    Posts
    811
    Default
    Hmm, the problem of using large capacity external batteries (DV batteries, 12-14V, etc.) is already solved, we are shipping the Power Plate which can be ordered in different flavors depending on what kind of a DC power source you want to use. Getting a hold of a DCC8 adapter off course is still a problem at this poing :-(


    Reply With Quote
     

  5. Collapse Details
    Senior Member keylight's Avatar
    Join Date
    Jun 2010
    Location
    US, Asia
    Posts
    1,113
    Default
    Quote Originally Posted by guyburns View Post
    What was the capacity of the battery? I don't think you have told us. Is it 4500 mAh, similar to the one used in the video you linked to?
    The battery is 4500 mAh. I'm updating the first post with this info too. Can't believe I forgot to include that bit of info!

    Speedpack 4500mAh Ni-MH 7-Cell Flat with TRA Conn.jpg

    http://www.amazon.com/Speedpack-4500...6180452&sr=1-2
    Last edited by keylight; 05-23-2011 at 02:09 PM.


    Reply With Quote
     

  6. Collapse Details
    Senior Member
    Join Date
    Feb 2010
    Posts
    908
    Default
    Quote Originally Posted by B3Guy View Post
    Why not open up a panasonic battery, take out the cells, and hook a larger battery into the circuit where the original cells were? Would this not provide the correct functions on the "extra" pins (whatever their function is)? Use an SMPS to tune the larger battery to what the original internal cells output. An expensive adaptor (cost of original battery plus a cable, SMPS, and whatever lipos/nimh/etc. you were using), but it would be "doing right" by the camera, no?

    You could take out the old cells and replace them with higher amp capacity cells but you have many limitations that are based on the controller IC's design. Many watchdog/GasGauge ICs are designed for specific numbers of cells, either 1, 2 or 3 cells(mostly 1 or 2 cells for these small packs). Some will allow you to parallel up cells but you still have to conform to the max/min charge/discharge currents and voltages. If it's a panasonic IC, we may not have the ability to get those details since they commonly design ICs for their own use and do not publish specs at all.

    Also, LI-ion charge controllers monitor each cell group for load. that means if your battery contains 2 cells, it monitors both cells. If you try to hook up an external LI-ion pack to the charge IC in the panasonic controller IC, it will not work.
    Last edited by Svart; 05-23-2011 at 02:21 PM.


    Reply With Quote
     

  7. Collapse Details
    Senior Member keylight's Avatar
    Join Date
    Jun 2010
    Location
    US, Asia
    Posts
    1,113
    Default
    Quote Originally Posted by adolgin View Post
    Hmm, the problem of using large capacity external batteries (DV batteries, 12-14V, etc.) is already solved, we are shipping the Power Plate which can be ordered in different flavors depending on what kind of a DC power source you want to use. Getting a hold of a DCC8 adapter off course is still a problem at this poing :-(
    I really like your solution, and if I had a ton of peripherals to use with my camera I'd consider getting it. But for the camera alone, it's just too pricey. That's not meant to knock your product or pricing model. Your gear is in a fairly specialized market which translates to higher production costs....

    But there's nothing quite like putting a $10, 1 hour, DIY adapter into the camera and slipping 8 hours of power into my pocket.


    Reply With Quote
     

  8. Collapse Details
    Senior Member g.l's Avatar
    Join Date
    Apr 2010
    Location
    UK
    Posts
    296
    Default
    Very useful info Svart.

    Quote Originally Posted by Svart View Post
    That's absolutely untrue.
    I'd already updated my post before your reply (after a bit of Googling).

    The extra pins are serial communication for SBS battery status alerts and for the thermistor (tracks cell temperatures for safety and proper charging).
    Good to know. The GH2 body of course doesn't charge batteries, but thermal monitoring (if used by the body) is of course a good idea.

    3rd party batteries do not handshake with the camera body nor provide GasGauge functionality. That's why you don't get the battery life indicator on screen, because the battery life info is coming from the authentic battery, not the camera.
    Are you sure that's true of the GH2 specifically? It already does voltage monitoring to implement it's software-enforced 8.4V PSU cutoff point, so it may well monitor the battery V directly. And of course it wouldn't do this (or display it) if it thinks a PSU is connected.

    Anyway, my point was that the additional pins are not required to simply power the body, as Roberto claimed.


    Reply With Quote
     

  9. Collapse Details
    DVXuser Sponsor adolgin's Avatar
    Join Date
    May 2004
    Location
    Lexington, USA
    Posts
    811
    Default
    Fair enough :-) It all depends on what gets you excited. The only thing I wanted to mention for everyone's benefit, is unless you have solid electronic background, and direct experience working with Li-Ion cells, batteries, and chargers, do not risk your camera by experimenting with the components and cells. It is just very easy for the things to go wrong in an instant. I do not mean to come across in the negative way or to talk down. If somebody has a specific question, please send a PM, I will try to answer. One general comment: Panasonic obviously designed the camera in such a way to prevent a common 8.4V DC power source from powering the camera externally. There is no way a 2 cell Li-Ion battery can deliver more than 8.4V DC power due do its electro chemical properties (Panasonic engineers know this too well). While many here experiment with the Ni-Mh RC batteries, unless you know what a freshly charged voltage is, you are risking the camera by potentially stressing its electronics with too high voltage.


    Reply With Quote
     

  10. Collapse Details
    Senior Member g.l's Avatar
    Join Date
    Apr 2010
    Location
    UK
    Posts
    296
    Default
    Quote Originally Posted by adolgin View Post
    While many here experiment with the Ni-Mh RC batteries, unless you know what a freshly charged voltage is, you are risking the camera by potentially stressing its electronics with too high voltage.
    I totally agree. We need to know what regulator is used so we can find out the safe upper voltage. Check out the circuit board Svart, can you spot the part? I tried but the scans aren't high-res enough.

    EDIT: Few more pictures here.


    Reply With Quote
     

Page 14 of 28 FirstFirst ... 410111213141516171824 ... LastLast

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •