Part 107 UAS pilot reported a battery failure which caused the UAS to crash.

Narrative

I was piloting the UAS. I am in good health. I'm not a smoker. I had a good night's sleep and was hydrated. I stood in the middle of the flight area and could easily see the UAS at all times. I arrived around XA:00 and walked the area to be mapped and chose a spot near the middle of the mission area that had great visibility to set up home and battery exchange point. Conditions: I utilized the Aloft app (v2.2.2.XXXX) stated the flight weather as: 64F wind at 7 from North gusting to 17 with visibility greater than 10. ALOFT showed no advisories for the location with a green zero box. Utilizing the DJI pilot app (V2.5.1.XX); in mission flight mode. The flight altitude for the mission was 138' AGL of home point. The total area of the mission was 32.0 acres and an estimated time of 55m and 1 sec. The estimated flight time means that the UAS returns to home point for battery exchange about every 15 minutes. How it was noticed: I was watching the UAS and thought it came to hover as it finished flying waypoints prior to returning to the home point. At that point it looked down at the controller to see if it was complete and noticed caution that the UAS was not connected. I looked up and the UAS was no longer in the air. I walked over and found the UAS in the field with damage to two arms and approximately 15 feet away I found the battery that had expanded and separated on one side of its casing. No battery materiel leakage or seepage was visible.It is my belief that the gust wind conditions required the UAS to utilize increased rate of battery power draw; the battery expanded causing the UAS to lose power resulting in an uncontrolled descent/fall from the sky into the field. No property was damaged; and no fire occurred. Management was in the final set of purchasing a MAVIC 3 to meet the remote identification requirement and upgrades us with multispectral capability. Because of this; management made a decision to utilize the approximately $400 repair funds towards the new/upgraded UAS in lieu of repairing the Mavic 2.