For those of you who dread the cost of new RC batteries, or those who are analyzing their ratio of flight time as it pertains to battery size, voltage and capacity then this post may be right down your alley. I think I may have a solution.

This is Kevin with ThrownException.com.  Take a look at my recent Blog post regarding a Model 3 21700 6S1P Drone battery design offering all the perks of voltage, capacity and weight.

Custom DIY 6S 21700 Drone Battery