Installing a SSD, should I or should I not disconnect the battery (MacBook Pro)? I'm about to switch my hard drive for an SSD. I checked for instructions online and found tutorials that instruct to disconnect the battery as a first step but I also found some forum posts from people saying it fried their logic board. 
A person also said a genius said disconnecting the battery could fry a logic board. 

The mac I want to install the SSD into is a MacBook Pro 13" late 2011. 

Should I disconnect the battery ?
Thanks !
You don't need to disconnect the battery, but it's a good idea.

The only reason you disconnect they battery is to ensure that there is no power on any of the circuits which could inadvertently be shorted.

If people fry their logic board while disconnecting the battery, it's most likely they used a metallic tool (like a screw driver) to pry up the battery connector; use a plastic spudger tool.