In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Q: Text: last night, i decided to change the batteries in my calculator in preparation for an ap physics test today. i didn't want to run out of battery in the middle of the test, of course. i thought i would try to be prepared for anything that could go wrong. boy, was i wrong.

i opened the multiple choice section and got to work on an equation. i double-, triple-, quadruple-checked my work. i was sure i was doing it right, so i reached for my calculator. i pressed the on button.

#your batteries are low.

#recommend change of batteries.

then nothing.

fuck.

i just took an ap physics test without a calculator.
A: 
TIFU by replacing my calculator batteries