Btw my experience so far- surface 3 came back today, MS sent me refurbished one but no complaints as it is almost like new, just some small scuffs. Surface pro 4 might be exchanged for new one in following days, still waiting for my sellers customer support to respond me. in the meanwhile, battery went totally dead and now my SP4 works only with charger.
37 117 mWh of 38152 mWh left (2.7% wear) after 70 cycles, 3 months of usage. Even more as I remember I had 39 200 mWh at the begining. It was still 37 600 mWh last week. I don't run on a battery until it's dead. Is it normal wear? How it is for others after 3 or more months of usage?