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Powering GH3
  • Just made topic about batteries for GH3 and AC couplers.

  • 62 Replies sorted by
  • This thing takes almost four hours to charge. However, it will last all day even while using wireless so that isn't that bad.

    I still want one extra battery though. I don't want the grip. That just makes the camera too big.

  • @mpgxsvcd: The GH3 battery is specified to store 1860mAh at 7.2V. If that takes 4 hours to charge, it would mean an average charge current of only 465mA - that would be extremely low, for no obvious reason. What does the technical data on the charger read?

    With "last all day" you certainly don't mean 24 hours of continous video recording, right? (That would mean a power consumption of only 0.55 Watts - quite unlikely.)

  • That doesn't seem to add up. I just used a 15000mAh battery for a shoot on my GH2 and in 5 hours, it was down to 50%. So that's roughly 7500mAh for 5 hours alone! That would mean the GH3 is WAY more efficient than the 2.

  • @karl

    I charged the battery twice this weekend. Both times it was completely empty when it started to charge. The charge didn't take exactly four hours. However, it was something like 3 hours and 45 minutes one time and probably 3 hours and 30 minutes the second time.

    It takes forever to charge. Trust me on that.

    Yes I didn't mean to imply you could record video for 24 hours straight. However, I believe you could probably use it for 24 hours worth of shooting if you let it go to sleep after about 1-2 minutes of inactivity. I had it on pretty much all of Saturday trying the wireless out and I didn't need to charge it until Sunday.

    The battery life is OUTSTANDING on the GH3. The charging time is not quite so good.

  • @vicharris

    Yes the GH3 was designed to be "WAY more efficient than the 2" and they accomplished their goal.

  • Just ordered a second battery from for $59 including shipping. It is not an original Panasonic battery but the lady at MelloDigital claimed it has the chip and will show battery life on the display. She also claimed it was rated for a higher mAH.

    We shall see. It is supposed to be delivered in two weeks. I wonder if it will charge faster?

  • Have you checked mellodigital on Good luck.

  • @Jspatz

    Yes I know about their ratings. They are known for bait and switch and that is in fact what they did. I am ok with that. If they deliver the off brand battery for $59 in 2 weeks then I will be satisfied. I am not counting on them doing that though.

    There are a couple interesting points about the GH3 battery in the manual.

    First, the GH3 battery does not appear to be chipped. The GH2 explicitly states that the battery is chipped. The GH3 manual does not.

    From the GH2 manual

    The camera has a function for distinguishing batteries which can be used safely. The dedicated battery (DMW-BLC12E) supports this function. The only batteries suitable for use with this unit are genuine Panasonic products and batteries manufactured by other companies and certified by Panasonic. (Batteries which do not support this function cannot be used.) Panasonic cannot in any way guarantee the quality, performance or safety of batteries which have been manufactured by other companies and are not genuine Panasonic products.

    The battery charge time for the GH3 is listed at 220 minutes in the manual. That is 3 hours and forty minutes. That is exactly what I saw when charging my camera this weekend.

    Here is the chart comparing battery life for the GH2 and GH3. This is a pretty big difference.

    GH3 = 500 pictures or 250 minutes of recording

    GH2 = 320 pictures or 160 minutes of recording

  • It's good to hear the GH3 makes efficient use of its powering.

    Regarding the very (and unusually) long charging time, you may want to try some universal LiIon/LiPoly charger, many of them charge at ~1A constant current (before the maximum voltage limit kicks in), so you should be able to charge the battery to ~90% in about 100 minutes.

    Regarding the "chipping": It would come as a huge surprise to me if Panasonic did not try to hinder people from using 3rd-party batteries. After all, in Europe, they are currently asking for 60 € per original GH3 battery, and that is such a huge factor more than the free market price of that material... this offer would not survive actual competition.

  • Whats the best solution if I would like to use a V-mount battery? I have been using classic "ENG style" cameras and the GH3 will be my first "DSLR style" camera. I will put it on a rig with monitor, pro mics, XLR-mixer (beachtec) and Camera lights. Would be great to Power everything from one single battery!

  • B&H just shipped my 2 spare batteries so it appears they are becoming available.

  • My Battery was 3 days earlier than my GH3 here. The Battery should haf a lifetime of 4 hours (GH2: 2.5 Hours). Charging Time was 3 hours on the first Charging-Time. They was a little bit charged, it showed 1/3, on the second Battery 2/3. It tooks for each more than 1 hour to empty it. And the red blinking warning comes 15 minutes before the Battery is finished (GH2 about 5 Minutes, sometimes 2 minutes). I have now a Paper, on which i write each and every Charging of the batteries.

  • so annoying that only ships to the US, are there similar batteries sold that ship international?

  • @vaitor

    Intermediary guys, like shipito always exist for such cases :-)

  • have you used them before? any good?

  • @vaitor

    Yes, constantly :-) They are very good.

  • Lithium ion batteries are not charged at a constant current. The current drops off as the battery nears the target voltage (around 4.2 V per cell). So it can take quite a long time to get the last 3-5% of the charging done, whereas the first 85% can go pretty quickly.

  • thanks for the advise vitaly... just ordered. I dont see any DC couplers out yet, has panasonic announced an official one? For long shoots I always used my Tekkeon Battery with the coupler, would be great to use that for the Gh3 aswell since it stays on 7.2V

  • @vaitor

    Just notice that most probably you'll need to lie a little, as USPS rised the ban in batteries shipping, but as I understand, not entirely.

  • mh mellodigital called that they are backordered... I never understand why stores dont update their shop. Anyone knows a shop that has them in stock?

  • I would be very surprised if a suitable internal 3rd party battery ever materializes. None ever did for the GH2 although many were advertised as such.

  • Happy New Year Everyone!

    I ordered a battery from Video Direct Electronics. The ratings aren't great, but if you read them you could draw the conclusion that the buyers weren't always being reasonable. I have purchased from them in the past and have only had good experiences... so go figure??

    I forgot about the chips in the GH2, but I hope this battery will work in my new GH3 and report the battery level.

    What do you think about that?


  • Me Again :-)

    I have another question about batteries for my GH3.

    I purchased one of the batteries that has 12V, USB, and 9V ports off of eBay. The video in the listing showed the battery powering a zoom and a GH2 using the coupler. I didn't consider the difference between the voltage of the 9V external battery and the stock internal battery (something like 7.4 volts DC or so), and it seemed to work just fine.

    So here's my multi-part question.

    • I purchased a coupler for my GH3, can I use that external 9V battery to power it?
    • Would that 9V external battery damage my GH3 over time because of the voltage difference?

    Thanks in advance guys!!


  • @questech

    This topic is not about GH2, so use proper topic for this part.