Is it safe to turn off iphone for 2 months?

I have turned off my iphone for 2 months.
when i turned off my iphone its battery was 58%.
is it good or bad for battery life of my iphone.

Added (1). Iphone model- iphone 4
1.5 yrs old

Seems good to me, losing around a 1/2 of a percent so yeah I would have expected it to be down more then that after 2 months.

Don't let dust collect on the iphone and you will be just fine.