This question already has an answer here:
I'm a web designer and I haven't gotten any chance to shut down my macbook pro often with my busy schedules. When I'm not working (sometimes on weekends), unfortunately I forget to shut down my Mac for 8-10 hours! However, yet I can charge the Mac after its battery shows 15%.
So, is being always in sleep mode a weakening it's battery life? and does it hurt the logic board, honestly?