What is the recommended battery for long flight duration?

for 450-500mm drone, emax 2212 935KV, dalrc ESC 4in1.

I have used 4s 2200mah and it gives less than few minutes.
also, what is the threshold of voltage for 4s battery that I should set the failsafe?

Hi @roishachar,

You can calculate the battery with the required parameters here.

I’d also recommend you to check this article. It should help you with choosing the battery too.

It’s better to discharge the battery no less than 30% of its voltage.

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