I have a 2011 13" MacBook Pro. I have replaced the battery once, replaced the charger two times (because it wore off/tore up). I have replaced the original drive with an SSD and pumped up the RAM so my MacBook runs pretty much like new with Sierra (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).
replaced batteries do not fully hold the charge and have much smaller life times.
because my laptop is showing no sign of slowing down, I would rather replace the battery with the original so I can use it for another 5 years or so.
The problem is I can't find original the MacBook Pro battery for a 2011 laptop. I may visit a store to find out but is there a away I can order an original MacBook Pro 2011 13" battery online?