Pls can you help me with the genuinity of my iPhone XS Max I got on the used market the battery section says degraded service and still no maximum capacity is shown that field is blank like a dash there but when I checked the iPhone battery cycle count it read 69 and it still last a day use as would a good battery I asked the seller he claims battery was not change pls even though I think it was changed why would the service degraded battery just not go