I have it turned off on my MacBook Pro, but on for my phone and iPad. my 4 year old macbook pro's battery is doing great, my iPad is still holding on (but it spends a lot of time unplugged or powered down), but my poor phone is hurting badly (4-6 hours of charge per day, claiming it's at 80% battery life).
my MacBook Pro still thinks its battery is awesome, even plugged in all the time.
my MacBook Pro still thinks its battery is awesome, even plugged in all the time.