Heavy portable user here...that's why we buy these tiny gems, right? Plug it in every night, use it all day. Absolutely no special battery care or treatment whatsoever. 503 Cycles Maximum Charge: 4059 mAh Design Capacity: 5297 mAh Maximum Charge: 76.9% All stats per Coconut Battery. rMB purchased new (1.2Ghz/512Gb) the first week they came out in 2015. Probably not too many users out there with over 500 cycles so I thought this might be helpful. My rMB is over a year old but I do have Applecare so I'll take it in when the battery hits 70%. At that point it's too low to get me through my day without a recharge so I'll need it to be back up in the 90%s.