1. Reminder: Please user our affiliate links to get to your favorite stores for holiday shopping!

External battery pack for A6000

Discussion in 'Accessories' started by AK47J, Jun 6, 2015.

  1. AK47J

    AK47J TalkEmount Veteran

    231
    Jan 31, 2014
    Central Oregon
    Last summer I did some time lapse videos. Could only manage about 2.5 hours on the Sony battery and less than 2 hours on a third party battery.
    I want to try some more time lapse and star trails, and would like a longer run time than 2.5 hours.
    This is what I came up with. Parts arrived today, so I have yet to experiment.

    20150606_185109-01.
     
    • Informative Informative x 2
    • Like Like x 1
  2. chrid

    chrid Super Noob

    807
    May 5, 2014
    australia
    Chris
    Cool, looking forward to the results :)
     
  3. WNG

    WNG TalkEmount All-Pro

    Aug 12, 2014
    Arrid Zone-A, USA
    Will
    • Like Like x 1
  4. AK47J

    AK47J TalkEmount Veteran

    231
    Jan 31, 2014
    Central Oregon
    That is pretty cool. I already have a pile of Eneloop Pro AA batteries, so I went that route instead. The 6XAA battery holder was only $6 shipped.
     
  5. WNG

    WNG TalkEmount All-Pro

    Aug 12, 2014
    Arrid Zone-A, USA
    Will
    Cool! Where did you source the AA kit?

    I happen to have the bike lights, so I focused from that end.
     
  6. AK47J

    AK47J TalkEmount Veteran

    231
    Jan 31, 2014
    Central Oregon

    I got the A/C adapter kit and AA battery holder on Amazon. I can post links if anyone wants
     
  7. Kirkp

    Kirkp TalkEmount Regular

    151
    Nov 2, 2014
    Links would be great if it works well for you.
     
  8. Kirkp

    Kirkp TalkEmount Regular

    151
    Nov 2, 2014
    For anyone else planning to do this I thought I'd point out it's probably best to always use eneloops, not alkaline batteries. 6 Eneloops at 1.3V are 7.8V, close enough to 7.6V that the camera expects. Fresh alkalines would be at least 9V.
     
  9. AK47J

    AK47J TalkEmount Veteran

    231
    Jan 31, 2014
    Central Oregon
    Used this setup a few times with mediocre results. Using 6 freshly charged eneloops results in the camera reporting 50-65% battery. So I tried 4 eneloops and two fresh alkalines = 100% yay. Did a 2.5 hour time lapse, camera said 50% battery at the end. Seemed promising. Did a 2 hour time lapse, camera said 25% at the end ... ? I did a couple more around the 2 to 2.5 hour, with widely different and disappointing final battery percentages.

    I have another idea, need to order a few parts/gizmos, I'll keep you guys posted.
     
  10. Kirkp

    Kirkp TalkEmount Regular

    151
    Nov 2, 2014
    I realized my comment above considered only nominal voltages of the cells. To do this right, one needs to consider voltage curves of each battery type. I'll be interested in your next iteration.

    E.g., eneloop:
    Eneloop%20AA%20HR-3UTGB%201900mAh%20(White)-Capacity.

    Lithium-ion (per cell):
    article-2013january-advanced-ics-simplify-accurate-fig1.

    There might also be some regulation circuitry in the battery packs.
     
    Last edited: Jun 30, 2015
  11. addieleman

    addieleman Passionate amateur

    Nov 13, 2012
    Netherlands
    Ad Dieleman
    I think the camera's indication of battery charge is completely off when you're using anything else than Lithium-ion batteries: the percentage indication is designed for Li-ion batteries and the discharge voltage characteristics of either alkalines or NiMH rechargeables are very different so it could well be that the camera indicates a low percentage while the NiMH batteries are still useable; using alkalines with their much higher starting voltage will surely make the camera think there's a full battery. In other words, just ignore the percentage. NiMH batteries easily have a capacity of 2000 mAh these days so your battery pack should last roughly twice as long as the Li-ion battery pack. Need more? Use D cells :).
     
  12. AK47J

    AK47J TalkEmount Veteran

    231
    Jan 31, 2014
    Central Oregon
    True. But if the camera "thinks" the battery is drained it will shut down, even if there is ample run time in the batteries.
     
  13. AK47J

    AK47J TalkEmount Veteran

    231
    Jan 31, 2014
    Central Oregon
    Got the parts today. The clear project box (not pictured) that I ordered is much bigger than I need (because the description of the voltage regulator was incorrect). Hope to give this setup a run soon.

    20150720_183015-1.
     
    • Like Like x 2
  14. ShaneD

    ShaneD New to TalkEmount

    4
    Aug 2, 2015
    Northern California
    Thank you for the information. Pleased keep us updated on the latest version. I'm getting ready to build one for A6000
     
  15. Tony Burns

    Tony Burns TalkEmount Rookie

    19
    Jan 7, 2016
    Delaware, United States of America
    Tony Burns
    Your post reminded me of my own desire for a continuous power supply to my a6000, and when I went searching around I came across the Sony ACPW20 (dummy NP-FW50 battery with an AC adapter), which I think I'm going to pick up now. One nice plus to the ACPW20 looks to be that the camera actually knows that it's on external power when you're using it, so no strange battery capacity indications.
     
  16. chalkdust

    chalkdust TalkEmount Veteran

    279
    Sep 25, 2015
    Bert Cheney
    I have not used one of these, but am interested in knowing how it works for you. It seems like it will support your studio, product shots well. I do not do studio work so am more interested in a mobile solution. Anyway, let us know what you think of it after you have used it.
     
    • Agree Agree x 1
  17. sam

    sam TalkEmount Regular

    51
    Nov 23, 2015
    Ontario
    sam
    I love these DIY projects.
    I have built many of these types of units, starting back in the early '90s, for my Sony FX420 camcorder. Then when I got my Minolta 7Hi, and also for my Canon DSLRs.
    I have also thought about one for my Sony NEX 5R, and now here is a thread on just that. Thanks for all the info on part sourcing.
    It might take a while to build, as I just got 2 new third party, high amp batteries, so now have 3 batteries for the camera.
    As I am interested in starting some time lapse photography, I think I will hurry this one up, and go for a test drive soon.

    Thanks