Reddit mentions of Venom 20C 3S 5400mAh 11.1V LiPo Battery with Universal Plug (EC3/Deans/Traxxas/Tamiya)

It's simple really. Do you want a drone you can always rely on and not have to put a lot of work into that gets great results, go buy a p3/4 or mavic, or do you want to spend a lot of time building which for me is half the fun of drones and have a drone that you'll have to work out mistakes and won't be too neat but once you get all the wrinkles out you can put on any gimbal camera, and with apm/pix you can have sonar, osd, telemetry, visua positioning module, gps/glonnas.

Basically for the same price or a little bit less you can build a drone that's just as good as the p3a/s with a GoPro and transmitter

Here's the part list for what you need to build a good filming diy quadcopter. I assume you already have a computer and transmitter. All of these are amazon prime items and eBay items with fast and free shipping. The best thing is that you don't need to solder anything, of course you could get variants of the parts that are cheaper but requires soldering by this way there's a lot less wires and clutter and you should be getting a 10-15 minute flight time



Usmile S500 PCB Quadcopter Frame Kit with Landing Gear

https://www.amazon.com/dp/B013YENQ2W/ref=cm_sw_r_cp_tai_MbZtzbBD5AAV5

30$

Motors 920 kv

https://www.amazon.com/dp/B01HM8EXJG/ref=cm_sw_r_cp_tai_edZtzb0VN0YF3

30&

Escs 4 in 30aX4

https://www.amazon.com/dp/B018A6K2SA/ref=cm_sw_r_cp_tai_zfZtzbC2VZBZ6

40$

16x 1045 props

https://www.amazon.com/dp/B01LZGJNAL/ref=cm_sw_r_cp_tai_BhZtzb7A38NV2

15$

Venom 5400 20c 3s lipo

https://www.amazon.com/dp/B000W7PZU6/ref=cm_sw_r_cp_tai_7mZtzbMKEHH7P

60$ but it's worth every penny

Apm 2.6 flight controller

https://www.ebay.com/itm/232151137887

30$

Apm power module

https://www.ebay.com/itm/231617302003

10$

Apm shock absorber

https://www.ebay.com/itm/321765065426

5$

Ublox neo m8n gps+glonass (great gps)

https://www.ebay.com/itm/252133458960

20$

Apm telemetry

https://www.ebay.com/itm/221783168543

20$

Apm osd

https://www.ebay.com/itm/132062166617

10$

3 axis gimbal for GoPro (I'd recommend tuning first)

https://www.ebay.com/itm/281776499167

60$

Fpv tx/rx

https://www.ebay.com/itm/281897786845

30$

Fpv good antennas

https://www.ebay.com/itm/122035038453

10$

$370 build total



I'd also recommend getting a GoPro to use with this




And if you want to get really advanced you can create a portable ground station to use with the drone while it's flying consisting of an Android tablet with gps which lets you do follow mode

https://www.ebay.com/itm/231894739709

Otg cable to connect to telemetry

https://www.ebay.com/itm/152247474853

This will let you control the drone using the tablet as if it was a computer running the apm app. There are a few good articles about it online if you search for it, or you could just get a small laptop


Even more advanced you can get sonar for apm and visual positioning models to make it like the phantom 4 and be really stable hovering