Dear, I'm experiencing the exact same problems on my MBP early 2011 with iFixit battery replaced some day ago, mainly: 1) very Lowe charging time (I reach the 100% full charge after 4/5 hours of continuous charge 2) the battery drain more or less uniformly but at a certain moment suddenly pass from 30% to 7% in a second 3) after few cycles of charge (<10 times) the battery capacity is already at 94% 4) iFixit change my battery because I encountered these problems, with this second battery replaced I'm encountering the same problems. 5) obviously I tried NVRAM and SMC resets but nothing changed. In my opinion iFixit macbook batteries are not good at all. Please let me know if you found a solution. thanks!