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extra high capacity battery / Additional side batteries
8053 31 2015-10-28
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alessandrobecca
lvl.4
Switzerland
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I wonder wether we will ever see from DJI (or third party) a higher capacity battery for the inspire then the TB48 model currently available, with for example 20 minutes flights with the X5 gimble. I think this will be greatly appreciated by a lot of users.
I realize the difficulty to make it fit in the currenty available space/housing but I am sure there is ways..
any comments ??
2015-10-28
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sultangris01
Second Officer

United States
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Unlikely anything official.  The phantom had a aftermarket kit that let you use two batteries at once, haven't seen anything like that for the inspire yet though.
2015-10-28
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ibdronin
Second Officer

United States
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2 batteries would be amazing! It could be done but who am I?
2015-10-28
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DJI-Tim
DJI team

Hong Kong
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Could be too much weight of x5 and 2 batteries at the same time for inspire's motors and props. The reconstruction  of the whole model needs to be done then
2015-10-28
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RichJ53
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DJI-Tim Posted at 2015-10-28 20:48
Could be too much weight of x5 and 2 batteries at the same time for inspire's motors and props. The  ...

Tim,

Could they come out with a taller pack that would increase the capacity by 25% and get the additional flight time but not to much weight gain? The top section of the battery could be bubbled to maintain air flow. This way no modifications would be necessary to the Inspire 1

I am hoping for the next battery chemistry to come out soon and be lighter with more energy.....  I know they are working on it right now.
Rich
2015-10-28
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dji Timster
lvl.3
Flight distance : 1762359 ft
United States
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thats a really good idea!!!!
2015-10-28
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alessandrobecca
lvl.4
Switzerland
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Yes, new chemistry combination could be a solution, but perhaps the full volume (density) of the present plastic battery housing has not been utilised, and yes a slightly taller battery could probably add a 25% capacity which I guess we would all be happy about. the extra weight added would be very limited, I think.
2015-10-28
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sultangris01
Second Officer

United States
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The inspire can carry quite a bit more weight, there's a few videos on YouTube of people testing it's lifting capacity, forget what the high score was though.
2015-10-29
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alessandrobecca
lvl.4
Switzerland
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I found some images of disassembled inspire batteries on the web..which I will try to enclose or post . as you can see the top section is completely empty except for the electronic board and on off switch, which perhaps could be accommodated on the sides if one were to produce a taller battery, to use all vertical space for extra LI-ION cells.
I agree with Paul , the inspire would have no issue to carry this little extra weight.
2015-10-29
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alessandrobecca
lvl.4
Switzerland
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2015-10-29
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sultangris01
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PaulKerry Posted at 2015-10-29 20:17
From memory, I think it was around 2 kilos.

I remember the figure 4 being at the limits of its ab ...

2.2 us pounds equals a kilo I believe.
2015-10-29
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alessandrobecca
lvl.4
Switzerland
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thanks for the video and your thoughts. So if we wanted have a TB 49 (with same extra capacity as between the TB47 and TB48) presumably it would add an extra 80-100 grams of weight , taking into account also a bit of extra plastic in case it is taller. I think the inspire can leave with it, without any major issues and also the CoG would not be really altered! Do you agree ? If a TB 49 would become available how many of you would go for it ?
2015-10-29
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sultangris01
Second Officer

United States
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Not me, the tb 48 only gives me 2-3 min more flight time than atb 47 and costs $50 more.  For the same amount of money spent you can one more battery if you go tb47 and gain a few more minutes flight time overall, you just have to swap batteries a couple minutes sooner.
2015-10-29
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GB44
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Flight distance : 343848 ft
United Kingdom
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Yeah there are British boffins also working on the Graphine batteries, which could provide exceptionally wafer like batteries and if they replaced the current cells it would provide very long flight times.  However as with new technology I would guess they would command a high price
2015-11-14
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jeffmcrae52
Second Officer
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This is the DBS mods Inspire  with battery mod and 2 extra lipos one either side

DBS mods

DBS mods
2015-11-14
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alessandrobecca
lvl.4
Switzerland
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jeffmcrae52@out Posted at 2015-11-15 08:33
This is the DBS mods Inspire  with battery mod and 2 extra lipos one either side

Thanks. Do you also have a pic from the side ? how are these 2 batteries connected to the other ?
flight times ??
2015-11-15
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teamnest1
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alessandrobecca Posted at 2015-11-15 14:41
Thanks. Do you also have a pic from the side ? how are these 2 batteries connected to the other ?
...

i would like to know this as well.
2015-11-15
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jeffmcrae52
Second Officer
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If you go to the web site there are a couple more photos   DBSmods.com   I'm sure if you contact them they will help you out.
2015-11-15
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alessandrobecca
lvl.4
Switzerland
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Thanks Jeffcrae52.
I sent them an email with a few questions. Lets wait and see. It appears they are connecting 2 x 2200 amp extra batteries in parallel to the main one , providing additional total 4400 amps which come (in case of a TB48) to a total of 10100 amps! that should (even taking into account the extra weight carried around) increase flight time considerably !
I do wonder however what kind of reading you get in the Go app when checking the battery ! Obviously overall battery discharge will be much slower,so that forecasted remaining flight time will be inaccurate.
Anyone thinks the parallel connection can bring any issues on the main original battery ?
20150912_201426-picsay.jpg
2015-11-16
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jeffmcrae52
Second Officer
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If you go to HorizonFpv in U.S. They do the battery mod
2015-11-16
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jeffmcrae52
Second Officer
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To start inspire turn on original battery first then plug in the other batteries to turn off do reverse
2015-11-16
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cookinghusband
lvl.2
Flight distance : 41463 ft
Hong Kong
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Extra battery = extra weight = extra motor load

You probably end up with no significant increase in flight time.
Currently
25 % more battery capacity only get you 10% more flight time (TB47->TB48)
Probably less efficient as it get heavier.( May be the new motor on the I1 Pro will; be better?)
2015-11-17
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alessandrobecca
lvl.4
Switzerland
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Well only way to know for sure it to try it out.
Have also in the meantime checked the horizon FPV website and what they offer. waiting to hear from them also.
Jeffmacrae52 , your starting sequence suggestion makes sense. Not sure however about switching off. You mean first disconnect the additional batteries  and then switch off the main original DJI one ?
2015-11-17
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mlpfw
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jeffmcrae52@out Posted at 2015-11-17 13:51
If you go to HorizonFpv in U.S. They do the battery mod

Went to the site and could not find it. Would you mind posting the direct url here?
2015-11-17
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alessandrobecca
lvl.4
Switzerland
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here is the link:
http://horizonfpvantennas.mybigcommerce.com/inspire-1-3-power-mod-v2/


battery saddles.jpeg
2015-11-17
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mlpfw
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alessandrobecca Posted at 2015-11-17 23:06
here is the link:
http://horizonfpvantennas.mybigcommerce.com/inspire-1-3-power-mod-v2/

Thanks for the prompt reply.
2015-11-17
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jeffmcrae52
Second Officer
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that is correct OEM battery on first snd off last
2015-11-17
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jeffmcrae52
Second Officer
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that is correct
2015-11-17
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Machoman
Second Officer
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Austria
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I am also experimenting with this mod but did not test it now.

My first concern was the C-rate. While most seem to use 25-35C additional batteries I wonder if this is enough. Maybe someone could bringt some light into it. Its said the TB48 is used first and then the additional batteries. Ok lets look

TB48 has 5400 mAh and saidto be 15C - thats still enough for 80 Ampere
but the smaller batteries have 1300 mAh with 35C its only 45 Ampere

The Inspire ESCs are made for up to 20 ampere = 4x20 = 80
It was tested that the Inspire under certain conditions actually uses ~53 Ampere.

Will a 1300mAh with 25C or 35C be safe?


I really dont know, I bought 1550 mAh 65C for first test thinking to go back to 1300 mAh with lower C if necessary for weight or possible with C-rate.



I use 3M industrial Dual Lock to fix the batteries this saves 80g weight plastics

http://multimedia.3m.com/mws/med ... 2-sj3870-sj3871.pdf

I expect a total takeoff weight of 3500g.







2015-11-18
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alessandrobecca
lvl.4
Switzerland
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Hi Machoman, thanks for sharing.
would be very interesting to hear you findings as well as seeing some pictures of how you have fitted the extra batteries on the inspire.
I don't have unfortunately enough knowledge about C value (I think it is the max burst output power) of batteries to comment on what you wrote, but always eager to learn.
2015-11-19
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fansbce99699
lvl.1

Cyprus
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26 minutes flight time with 2 batteries tb48 main and secondary Tb47
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2017-10-14
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Mark Guille
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Guernsey
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fansbce99699 Posted at 2017-10-14 03:35
26 minutes flight time with 2 batteries tb48 main and secondary Tb47

Thanks for sharing. How are you connecting the second battery?

Mark G.
2017-10-14
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