The fan is on, you've just finished your 2nd milky iced tea and are ready to scroll through your phone.
But your device runs slow, overheats or runs out of battery. Sound familiar?
The current record high temperature affects not only people's bodies but also their electronic devices.
However, unlike humans, phones can't sweat - which is fine for people holding their phones but not so good for our handsets. So why do our electronic devices struggle in the heat and what can we do about it?
But your device runs slow, overheats or runs out of battery. Sound familiar?
The current record high temperature affects not only people's bodies but also their electronic devices.
However, unlike humans, phones can't sweat - which is fine for people holding their phones but not so good for our handsets. So why do our electronic devices struggle in the heat and what can we do about it?
Heat rises, CPU slows down
In the same way that we struggle to run at the same speed in high temperatures, it could be the same thing for a phone's processor - a chip inside that is 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 that electronic devices are typically designed to operate at 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 that we often increase screen brightness when outdoors in the sun, which can also have an effect.
Screen burn
If you've noticed a slight change in your screen, the heat might have had an impact.
"If it's an older phone, if there's a slight defect in it, the heat will magnify it," says Dr Roz.
She adds that screen protectors can often trap more heat inside, which is not good in hot conditions.
What you can do to keep your phone cool
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Don't stick it on charge
"If it's really hot, when you are charging your battery, you are generating heat. When your device has been on charge, it ends up being hotter," Dr Roz says.
Position it smartly
"Keeping it out of direct sunlight helps. Don't leave it in your car, keep in the shade as much as possible. Put it in front of a fan if you can."
Keep it light
This applies to both inside and outside the phone. Take it out of the case and turn off any functions you don't need.
"If you're not using the GPS, if you're not using stuff, turn it off. Because the less stuff you actually use, the less energy you're going to use, the less heat it's going to generate," she says.
Low power mode
The less power you use, the better off your phone will be.
"Sometimes just simply, if your phone's really struggling, turn it off for a few minutes, just let it all cool down, and then turn it back on again."
But do not use a fridge or freezer...
"Don't stick it in a bag of ice, because that doesn't help it."
Rapid temperature changes can have a very bad effect on your phone, and ice can cause water to stagnate.
Dr Roz adds that phones have a built-in overheating mechanism to prevent them from "killing themselves, which can happen in really bad temperature conditions".