HGLRC Rekon 3 - how to fly an 18650 battery

The Rekon 3 from HGLRC Rekon FPV is a very interesting little quadcopter or drone. You can take it out of the box and fly it "as is" but I think its real value may be as a starting-point for experimentation with this sort of "flying battery" quadcopter.
Pros:
- ready to fly (available with a range of receiver options)
- it works
- good VTX gives excellent range for analog FPV

- novel and interesting
- small and light (half the 250g limit in many countries)
Cons:
- can't use all the Li-Ion battery's capacity due to voltage sag
- fragile (several reviewers broke theirs while reviewing them)
- noisy video
- linear VTX antenna
- no boost regulator so browns out easily
- not very powerful
- no buzzer/beeper so could be easily lost
- camera/VTX not compatible with Skyzone RapidMix
Although billed as a "long range" drone, this thing will probably get you about 1-1.5Km from a video perspective and you may want to be careful where you fly it for fear of losing it in the grass.
Bottom-line:
If you're interested in the concept then this is a great starting point and offers a huge opportunity to experiment and try out your own ideas for a relatively low cost. Even as a novelty, this thing has value - just be gentle with it because it will break quite easily - although mine's still intact.
Relevant links:
Rekon 3 webpage:
https://rekonfpv.com/collections/new-arrivals/products/rekon-3-nano-long-range-fpv-quad
DaveCFPV's YouTube channel:
https://www.youtube.com/channel/UCkoI3H6exUxzd5pbadisWig
AndyRC's review:
https://www.youtube.com/watch?v=V4IaM95b_Y0
Painless360's review:
https://www.youtube.com/watch?v=M-E2lNS10oE
Albert Kim's Review:
https://www.youtube.com/watch?v=bzfUiUnFO3E
A big thank you to my patreon supporters who make it possible for me to make these videos without commercial pressures and without mid-roll ads.

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