The fan is on, you've just finished your 10th iced coffee and are ready to scroll through your phone.
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But your device is either slow, too hot or has a drained battery. Sound familiar?
Current record-breaking temperatures are not just affecting people's bodies, but also their electronics.
But, unlike humans, phones can't sweat - which is good for those who hold their phones but not great for our handsets.
So why do our electronics struggle in the heat and what can we do about it?
Heat goes up, processor slows down
Much like how we struggle to operate at the same speed in intense heat, it can be something similar for the phone's processor - a chip inside that's responsible for its main functions.
"The internal things that actually make it all work, unfortunately, themselves generate heat in the way they work," says Dr Roz Wyatt-Millington, a senior lecturer in Electronic and Electrical Engineering at Leeds Beckett University.
"And as the device gets hotter for phones, the processor tries to stop itself overheating, and it ends up slowing everything down as a result," she tells Radio 1 Newsbeat.
She says electronics are generally designed to work up to 35 degrees Celsius.
From 100% to battery drained
"Batteries store energy and are designed to work at certain temperatures. The hotter they get, the harder they have to work and the more energy they use," says Dr Roz.
Which means the battery life gets drained more quickly, especially as it's harder to cool.
"They also use energy to monitor their own state, and basically have to do more work."
Dr Roz adds we often turn up screen brightness when outside in the sunshine, which can also have an impact.