I've been flying Phantoms for a year now. I've got over 200 flights on my P3P, but my 5 batteries have less than 50 charges, and they are still performing great. My P4 is still below 20 charges each on the 3 batteries I have, no problems whatsoever. I'm sure there are others with more air time than me, so I'm hoping to find out if anyone has worn out a battery. I haven't seen anyone mention this yet, I didn't quick search but found nothing. Has anyone seen a DJI battery swell up or simply won't last as long on a charge? If so, how many charges were on the battery, and what was the symptom? Should we be looking for battery swell at 50 or 100 charges, etc? What are the limits you use to decommission a battery when the time comes? If the battery is swollen, it's obvious it should be decommissioned, simple decision, but I haven't heard anyone with this issue yet. Does swelling happen very often? If the battery flies only 13min instead of the normal 16 to 18min (P3P), at what point of degraded battery duration would you decommission the battery if it's not swollen? 75% of normal?