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battery issues
912 15 2015-6-29
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jai26
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United Kingdom
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im jai im new to this forum and new to drones.
i have borught a dji f450 with a naza m lite. and the battery i use is a floureon 5500mah 11.1 v 35c and i got a b3 ac lipo charger.
im not shore if the battery is charging propperly. when i tested it on a multy meeter and it comes up with 11.80, 7.81 and 3.89. is this reading right?
and dose anyone know if there is a common problem with the dji f450 and the naza m lite on battery problems?
thanks jai
2015-6-29
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DJI-Dave
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Those numbers are not correct. Each fully charged LiPo cell should read 4.2 volts, so a 3 cell 11.1v pack fully charged will register 12.6 volts.

There is no common problem with the F450 and naza m lite.
2015-6-29
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jai26
lvl.1

United Kingdom
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hi
thanks so the battery is dead then?
2015-7-1
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DJI-Dave
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United States
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I would think so but I would need to look at it to be sure.
2015-7-1
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jai26
lvl.1

United Kingdom
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Ok thanks
2015-7-2
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Mark97564
Second Officer
Flight distance : 2067749 ft
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Your not checking it right, your black wire on your meter stays on the black wire of the balance blog and your moving just the red one and that is giving you the voltages from just the first cell and then 2 cells and then all 3 cells..  When you move your red meter lead over to the next wire on the balance plug you need need to move the black meter wire over too and then you will get readings of each cell that will be 3. Something to 4. Something volts..  I would recommend getting a actual lipo tester so you don't keep tossing good batteries.. Also your charger should be able to tell you each cells voltage if the balance plug plugs into it. And as long as the difference between each cell is less than .1 your battery is ok, .1 volts or more difference in cell voltage it's bad.. But ideally they should all match..  And your battery is within specification by the way...  3.89 volts is your 1st cell, 3.92 is your 2nd cell and 3.99 volts is your third cell.  You can test like you are but you would have to subtract the other cells voltages..  Your battery is in desperate need of a good balance charge..  Do that and then let's see what each voltages are..  Again you can't leave the black meter lead on the black balance wire or every time you move only the red meter lead your voltage is going to go up because your going to another cell in series. Moving both meter leads over each time is how you keep each cell isolated..

If you need more help let me know..  I own 6 of the flour eon batteries and they work great, I'm very happy with them and the best part is they are cheap
2015-7-5
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DJI-Dave
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Mark97564 Posted at 2015-7-5 18:22
Your not checking it right, your black wire on your meter stays on the black wire of the balance blo ...

Where are you getting those numbers?

All he said was 11.80  7.81 and 3.89
2015-7-7
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Mark97564
Second Officer
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United States
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Cuz I know how he got them, he tested the balance plug with his volt meter wrong, he told us the voltage of the 1st cell,  and then the 1st and second cells together and then all 3. Cell 1 was  3.89 volts and cell 1 and 2 together 7.81 and all 3 together 11.80.  7.81 + 3.89 = 11.8 volts..  do you see what he did now?
2015-7-9
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Mark97564
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If you take the black lead from meter and put it on the black wire in the balance connector and leave it there and only move the red lead down the rest is the wires in the balance plug you going to hey voltage of 1 cell,  then the voltage of 2 cells and then the voltage of all 3 cells,  so each time you move to the next wire the voltage will go up.  To properly test a balance plug with a Meter you have to move both leads to the next wire in order to read each cell or do it like he did and use some math
2015-7-9
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Mark97564
Second Officer
Flight distance : 2067749 ft
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On the balance plug the black and red wires are connected the same as the main discharge wires and the rest of the balance connector wires are connected between  each cell..  u can't get each cells voltage leaving the negative lead of the meter at the end of the cells in series..   Google how a lipo battery is wired and you will see what I'm trying to say
2015-7-9
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DJI-Dave
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Mark97564 Posted at 2015-7-10 09:10
If you take the black lead from meter and put it on the black wire in the balance connector and leav ...

Yeah I see what you are saying now.
2015-7-14
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DJI-Dave
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Mark97564 Posted at 2015-7-10 09:14
On the balance plug the black and red wires are connected the same as the main discharge wires and t ...

Got it. Thanks.
2015-7-14
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DJI-Dave
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Personally I don't use a muti meter. I use a lipo checker. Much easier. I have used multi meters but that was a long time ago. The lipo checker is so much easier.
2015-7-14
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DJI-Dave
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Mark97564 Posted at 2015-7-10 09:06
Cuz I know how he got them, he tested the balance plug with his volt meter wrong, he told us the vol ...

Yep the math works. That is what he did.
2015-7-14
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Mark97564
Second Officer
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Yes they are, but it's still a good thing to know how to use one I think...  Lol
2015-7-16
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DJI-Dave
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Mark97564 Posted at 2015-7-17 05:12
Yes they are, but it's still a good thing to know how to use one I think...  Lol

Yes I agree.
2015-7-16
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