Yes I did. I think a 4S2P with Sanyo 20700B cells will work too. Though the continuous discharge rate would be 32A (vs. 45A) and internal resistance is higher ~26mOhm per cells (vs 20mOhm). That is why I decided to go with the 30Q. A 20700B pack would weigh less with ~535g (vs. 593g). The 20700A with 3000mAh and 30A discharge would be fine for every use case for sure.Have you concidered one of the 20700 series cells? Maybe Sanyo ncr20700b, at 15amp constant current. not sure how weight will play in... they are 61g each. But at 4000/4250 mah each it might be a gain.
Hi, thanks for the interest. I am a student and I have no intend to make a shop or business and sell them "officially". This is my semester holiday project. However I m happy to make some batteries for for Solo users. I would charge ~100$ per battery (with shrink tubing and better plus pole protection) with support for installation. However I do not have BMSs. I m based in Switzerland, shipping is not cheap.Good job!! Let me know when you are ready to sell some!!
Have you concidered one of the 20700 series cells? Maybe sanyo ncr20700b, at 15amp constant current. not sure how weight will play in... they are 61g each. But at 4000/4250 mah each it might be a gain.
Soon batteries will be hard to find. ..I wish some battery company would make an upgrade for the solo. ..there is still a huge market for them. .
Soon batteries will be hard to find. ..I wish some battery company would make an upgrade for the solo. ..there is still a huge market for them. .
Soon batteries will be hard to find. ..I wish some battery company would make an upgrade for the solo. ..there is still a huge market for them. .
ImIm thinking a 4S2P 8000mAh pack at under 500g with those particular cells would get you just under 20mins flight time with gimbal and GOPRO it's a good cell and current wise it's capable but the dimensions to fit in the battery bay may be challenging
The current available solo batteries are new unused but are very old stock, the 3rd party aftermarket support is what you will have to rely on from this point forward
According to 3DR one would need to program with SMBUS v1.1 standard and it should be fine.
https://dev.3dr.com/hardware-batterybay.html
https://dev.3dr.com/hardware-battery-charging.html
To be done:
1. Find a SMBMS that can handle max. 50-60A
2. Programm it according to the cells used
3. Produce the battery
Me I like to approach with a power module much better as you can plug in any RC battery. Downside is battery percentage is not so accurate for example if you start flying with a half full battery. What you normally don't but still. And this would be less "fool prove".
For photography 20700B cells should be fine but not for this kind of flying:
Lengthwise space could be a problem.
Yep. Looks like it would do it. Anyone willing to pay $50 before the price of cells for an aftermarket battery?
as long as it is SmBUS v1.1 it can communicate with thatDoes anyone know if AP will talk to just any SMBus BMS or are there only certain chips that are compatible? Does it stick to the standard implementation or are there extensions or customizations ?
@looninho this is really great! I dont know exactly what the BMS does. But Im sure the battery failsafe has as well to do something with voltage. Im not sure if the capacity algorithm is only based on used mAh. And how does the BMS know about mAh or until which voltage does it count mAh?.
I have a half defectiv BMS board. Let my know if you want to tinker with it to read the chip.
I will try to make a power module work.
Great work!!
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