battery holder
thingiverse
The hook on my drone's controller is specifically designed to hold three batteries, each 750mah in capacity. These basic batteries have a unique shape that allows them to be securely fastened onto the controller using a flexible spring-like mechanism. This design choice provides a snug fit, ensuring the batteries remain in place during flight. I purchased this quadcopter from Amazon, and you can find it listed here: https://www.amazon.com/Quadcopter-Altitude-Function-Beginner-Batteries/dp/B07HVT748J/ref=sr_1_3?crid=2K29F84M69I82&keywords=z8w+rc+drone&qid=1565028457&s=gateway&sprefix=z8w%2Caps%2C342&sr=8-3 Additionally, it's worth noting that this setup also works seamlessly with Syma transmitters.
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