I am trying to get an impression of the longevity of the the battery in the first-gen MBPs. What is your cycle count and design capacity? How often do you perform condition charges/discharges? How long have you let it sit empty, full, or unused for an extended period? I have an early 2015 13". The battery was manufactured in April, but first used in May. That makes just over 18 months of active use. I have 205 cycle counts, and the design capacity hangs around 95%, though it jumps up and down based on how long it has been since I done a conditioning charge/discharge.