Crossing Bridge puzzle

Problem statement:
Four people need to cross a weak bridge at night.
They have only one flashlight and battery only can last for 17 hours;
Bridge can only support 2 people at a time

Now the diversity is different people can cross it in different speeds. Some fast and some slow.
p can cross in 1 minute
q can cross in 2 minute
r can cross in 5 minute
s can cross in 10 minute

When two are walking together, they walk together :)

can u do it in 17 minutes?

P,Q GO 2 minutes.
Q comes back with light 2+2 =4
R,S GO 2 minutes.
P comes back with light 10+1 =11
P,Q Go ==2

Idea is -- faster people have to do double shuttle.
And group the slowest to go together.