I have 2011 13" MacBook pro. I have replaced battery once, replaced charger two times (because it wore off/tore up). I have replaced original drive with SSD and pumped up RAM so my MacBook runs pretty much like new with Sierra OS (upgraded).
Now I am not taking chances on off-brand batteries because
they can potentially damage/brick my laptop (my replacement battery had swollen after an year)
Replace battery do not hold charge fully and has much smaller life time 3. because my laptop is showing no sign of slowing down, I would rather replace the battery with original so I can use it for another 5 years or so.
The problem is I can't final original MacBook pro battery for 2011 laptop. I may visit store to find out but is there a away I can order original MacBook pro 2011 13" battery online?