I bought the fly more combo planning on maybe picking up a 4th battery later on...but then I saw Amazon has "renewed" batteries right now for $46. So I ordered 2 since they're basically half price and nearly all the reviews are positive. Plus I can just send them back if they're bad. Many reviews say they're getting batteries that are unused/0 charge cycles. We'll see later tonight when I pick them up heh.
DJI
Mavic Air 2 Intelligent Flight Battery - Replacement Spare Battery 3500mAh 34min Flight Time Accessory for Drone (Renewed)
https://a.co/d/e7gWmZf