Will %40 battery last enough?

I'm staying at a hospital with my aunt for my grandma. It's 12:30 and I have %40 battery left on my iPhone 4. I'm leavin at 2:30. I'm not going to be on it non-stop, but every know and then I'll text for a few minutes or check Instagram/Facebook/amazon. Will it last?

Should be ok.

No, it won't last. For one, you still have 2 hours to kill, and I'm sure that you will be checking your social networks once in a while (which consumes a significant amount of power).By 2:30, I believe your battery will be down by 20%.

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