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Your phone’s battery drains fast
If your phone’s battery drains fast, it’s usually down to a worn battery – especially if the percentage jumps around or the phone suddenly switches off. It can also be caused by apps using power in the background, high screen brightness or poor signal. Check your settings first. If that doesn’t help, a battery replacement is often the answer.
What does it cost?
You always get a fixed price before we start. See the price for your exact model in the price finder.
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This guide covers all smartphones – Samsung, iPhone and other brands – and focuses on how to spot a worn battery. If you have an iPhone and want the iPhone-specific settings, read why does your iPhone battery drain so fast?
Signs your phone’s battery is worn
Erratic percentages and sudden shutdowns
Maybe it sits at 30 % for ages, then suddenly drops to 5 % or switches off without warning. That’s a typical sign the battery can no longer deliver power steadily.
The phone gets slow
Some phones slow themselves down when the battery is worn, to avoid switching off.
The phone gets hot or bulges
If the phone gets unusually hot, or the screen or back starts to lift, the battery may be swollen. Stop using and charging it, and get it checked as soon as possible.
It only holds power on the charger
If the phone has to be plugged in all the time to work, the battery is badly worn.
Other reasons your phone runs out of battery
- Background apps: Check in your battery settings which apps use the most power.
- High brightness: The screen is the biggest power drain. Turn on auto-brightness.
- Poor signal: The phone uses more power when it’s searching for a signal.
- Location and Bluetooth: Turn them off when you’re not using them.
- Old software: Update your phone, as updates can improve battery use.
How to tell if it’s the battery
On an iPhone, you can see the battery’s condition under Settings > Battery. On many Android phones, such as Samsung, you’ll find battery information in the settings for battery and device care. If you’ve adjusted your settings and the phone still drains fast, the battery is most likely worn.
We replace batteries on both iPhone and Samsung – see iPhone repair and Samsung repair.
Frequently asked questions
How long does a phone battery last?
It depends on how you use it and how you charge it. All batteries wear out gradually, and after a few years of use most phones can benefit from a new battery.
Can a worn battery be dangerous?
An ordinary worn battery isn’t dangerous, but a swollen battery can be. If the phone is bulging, stop using and charging it, and get it checked.
Can you replace batteries on Samsung and other brands?
Yes. ITech-Rep replaces batteries on iPhone, Samsung and many other brands. See Samsung repair or phone repair.
How much does a battery replacement cost?
The price depends on your phone model. See the price for your model on our prices page. You’ll get the price before we start.
If your phone needs a new battery, you can have it replaced at ITech-Rep in Odense and Nyborg. Read more about battery replacement, or book online.
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