Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

How to discharge your Phantom battery?

Discussion in 'Pro/Adv Discussion' started by FCPhantom, May 12, 2015.

  1. FCPhantom

    Joined:
    Mar 23, 2014
    Messages:
    168
    Likes Received:
    27
    Location:
    Finland
    How you can discharge your Phantom battery? Can I use e.g. bulb and connect it to battery terminals?
     
  2. msinger

    Approved Vendor

    Joined:
    Oct 30, 2014
    Messages:
    24,101
    Likes Received:
    7,311
    Location:
    Harrisburg, PA (US)
    #2 msinger, May 12, 2015
    Last edited: Oct 29, 2015
  3. FCPhantom

    Joined:
    Mar 23, 2014
    Messages:
    168
    Likes Received:
    27
    Location:
    Finland
    Thanks! It should work with 3-6 cell battery.You use it with your Phantom3 battery?
     
  4. msinger

    Approved Vendor

    Joined:
    Oct 30, 2014
    Messages:
    24,101
    Likes Received:
    7,311
    Location:
    Harrisburg, PA (US)
    I've only tried it on Phantom 2 batteries so far. The connector is the same though, so it should work on a Phantom 3 battery.
     
  5. RyanK

    Joined:
    Apr 9, 2015
    Messages:
    311
    Likes Received:
    62
    Is this necessary for the P3?? I thought the battery self discharges after 10 days anyway.
     
  6. Meta4

    Meta4 Moderator
    Staff Member

    Joined:
    Jan 8, 2014
    Messages:
    9,341
    Likes Received:
    4,445
    Flying is the best way to discharge but if that's not possible ...
    Point 3 here should be useful .. the time to discharge is adjustable in the app[​IMG]
     
  7. msinger

    Approved Vendor

    Joined:
    Oct 30, 2014
    Messages:
    24,101
    Likes Received:
    7,311
    Location:
    Harrisburg, PA (US)
    In the Phantom 2 manual, DJI recommends completely discharging batteries every 20 charges. I don't see that in the Phantom 3 manual -- but, they do talk about completely discharging the battery for some reason.

    Flying is surely the fastest way to discharge a battery. However, your Phantom might drop from the sky if it does not land itself in time when the battery is low. For that reason, I do not recommend anyone ever try to completely discharge a battery by flying the Phantom until the battery is in a dangerously low state. If you value your investment, you should always land at or before the battery reaches the low level.

    Here are some safer ways to discharge a battery:
    • Per the Phantom manual, turn your Phantom on with the motors (and props) off and wait for it to shut off.
    • Sit your Phantom on the floor, attach some kind of weights to the landing gear (so it doesn't fly away), and run it until it shuts down.
    • Use a battery discharger (like I linked above) or the SmartPower charger (not approved by DJI either).
     
    #7 msinger, May 12, 2015
    Last edited: Oct 29, 2015
  8. Recce2

    Joined:
    Dec 4, 2013
    Messages:
    103
    Likes Received:
    31
    Location:
    Duluth, MN
    You have a good point and good recommendations. It does state this in the Phantom 3 Smart Battery Safety Guidelines on page 3.

    "Charge and discharge the battery completely once every 20 charge/discharge cycles. Discharge the battery until there is 8% remaining power or until it can no longer be turned on, then recharge it the the maximum capacity. This power cycling procedure will optimize battery life."

    http://download.dji-innovations.com...igent_Flight_Battery_Safety_Guidelines_en.pdf
     
  9. msinger

    Approved Vendor

    Joined:
    Oct 30, 2014
    Messages:
    24,101
    Likes Received:
    7,311
    Location:
    Harrisburg, PA (US)
    Ah, good find. So, that's still a requirement with the P3 batteries.
     
  10. RadRich

    Joined:
    Nov 27, 2015
    Messages:
    388
    Likes Received:
    96
    Page 4 on the Intelligent Battery PDF (Phantom 3) you posted in another thread (Store battery | DJI Phantom Forum)

    [​IMG]
     
  11. msinger

    Approved Vendor

    Joined:
    Oct 30, 2014
    Messages:
    24,101
    Likes Received:
    7,311
    Location:
    Harrisburg, PA (US)
    Yes, sir. And, you dug up an old thread ;)
     
  12. BigAl07

    BigAl07 Moderator
    Staff Member

    Joined:
    Jan 5, 2015
    Messages:
    3,137
    Likes Received:
    1,694
    Location:
    Western North Carolina
    The weather here in WNC has been down right crappy for days. This is only the 2nd time since I've owned the P3P that it hasn't flown enough for the "auto discharge" to come into play and I have it set to 3 days (I think 3) in the GO ap. Last night I opened the case and checked all (4) batteries and sure enough they registered around 60% - 65%. I am planning to fly some this evening and all weekend so I topped them off last night.

    The AutoDischarge is pretty sweet.
     
  13. tommi.piiroinen

    Joined:
    Dec 6, 2016
    Messages:
    109
    Likes Received:
    9
    My battery has 35 cycles and it hasn't ever been calibrated.

    I flew it down to 25% and left it powered without props.

    I read that then let the battery die while ac powered.

    It went to 0% and cells down to 3,3 volts.

    Then I read that you shouldn't let it discharge below 8% or completely discharge until battery dies.

    Waiting now battery to cool down and then charge to 100%.


    Did I make a mistake when I discharged it completely down to 0%???

    Lähetetty minun SM-G930F laitteesta Tapatalkilla
     
  14. grin factor

    Joined:
    Nov 29, 2016
    Messages:
    177
    Likes Received:
    52
    I wouldn't worry, the battery should be okay once fully charged.
     
  15. Roamer105

    Joined:
    Mar 10, 2016
    Messages:
    261
    Likes Received:
    55
    That's what I do. I take a 50 Watt 12 Volt halogen bulb and let it drain the battery. Make sure to monitor the voltage and verify the state-of-charge percentage to prevent over-draining.
     
  16. tommi.piiroinen

    Joined:
    Dec 6, 2016
    Messages:
    109
    Likes Received:
    9
    Just charged the battery full.

    I did put it in to AC to see did i kill it, but it seems good. All cells are @ 4.3 volts but dji go shows that batterys total capacity is "only" 4350mAh?? There is printed 4480mAh to the battery. It did show the same even before discharge so no change here.

    When more and more cycles come and battery life gets worse does this total capacity decrease?

    Lähetetty minun SM-G930F laitteesta Tapatalkilla
     
Loading...