Had one of the first EVO 1 Rugged bundles purchased in 2018. Love the drone but the lack of being able to monitor the batteries is ridiculous. I have other DJI and Yuneec drones that you can discharge the batteries to storage level that still have no problems. All of these have cell variance problems. I just picked up 2 more for a total of 3 that still function. I've spent $700 on batteries alone. Not bitching just saying Autel could do better than this.