Tips for Making Your Smartphone Battery Last Longer

Why Phone Batteries Wear Down

Most modern smartphones use lithium-ion batteries, and they are happiest when they sit somewhere between roughly 20 and 80 per cent charge. They dislike being kept at 100 per cent for hours on end, they dislike being drained to zero regularly, and they really dislike heat. Understanding that simple picture changes how you treat your phone day to day. You do not need to baby it, but a few small habits will noticeably slow the decline in capacity.

Battery health is measured in charge cycles. A cycle is one full discharge and recharge, though it accumulates in fractions. If you use 40 per cent and top up, then use 60 per cent later, that is one cycle. Most phone batteries are designed to keep around 80 per cent of their original capacity after 500 full cycles, which for an average user is somewhere between 18 months and three years. The tips below help you get closer to the better end of that range.

Start With the Screen, Because It Eats the Most

The display is usually the single biggest drain on any phone. Turning brightness down is the fastest win available to you, and it costs nothing.

• Use auto-brightness. It adjusts to your surroundings so the screen is only as bright as it needs to be. On a dull British afternoon indoors, it will often sit far lower than you would set it manually.
• Shorten the screen timeout. Thirty seconds rather than two minutes saves power across the day, especially if you put the phone down mid-scroll.
• Switch to dark mode if your phone has an OLED screen. Black pixels are genuinely switched off on these displays, so dark backgrounds draw less current.
• Turn off always-on display if you do not rely on glancing at it. It keeps a portion of the panel awake all day.

If you want one change that gives the biggest visible improvement, this is the section to act on first.

Rein In Background Activity

Apps you are not looking at can still be waking the phone, checking for messages, refreshing feeds and using location. A handful of these will quietly shave hours off your day.

• Review background app refresh. Turn it off for shopping, news and social apps, and leave it on only for messaging and anything genuinely time-sensitive.
• Restrict location access. Set most apps to "while using" rather than "always". Very few need your position in the background.
• Close battery-hungry apps such as mapping or video streaming when you have finished with them, rather than leaving them running behind everything else.
• Watch your notifications. Every alert lights the screen and wakes the processor. Muting noisy apps also saves charge.
• Check the settings menu for a battery usage breakdown. Nearly every phone has one, and it will name the worst offenders in plain terms.

You do not need to prune everything. Two or three of the heaviest apps restricted is usually enough to make a noticeable difference.

Keep It Cool, and Mind the Charging Habits

Heat is the biggest enemy of long-term battery health. A phone left on a sunny windowsill, on a car dashboard, or under a pillow while charging will age faster than one kept at room temperature. On a hot day, take the case off while charging, and avoid using the phone heavily while it is plugged in.

• Avoid overnight charging every night. If you can, charge in the evening and unplug before bed, or use a phone's built-in charge limit if it has one.
• Partial top-ups are fine. Topping up from 40 to 70 per cent is kinder than running to empty and back to full.
• Do not leave it at zero for long. If you are storing a spare phone, keep it around half charged.
• Use a sensible charger. A well-made charger matched to your phone is safer and more efficient than a cheap unbranded one.

Cold is less damaging than heat, but a phone that has been in a coat pocket on a frosty morning may shut down early. Let it warm up indoors before charging it.

Small Settings That Add Up

Once the big items are handled, a few extras are worth a look.

• Turn off vibration for notifications, or reduce it. The motor uses more power than a quiet tone.
• Switch to Wi-Fi where you can. On a weak mobile signal, the phone ramps up its radio and drains quickly. If reception at home is poor, Wi-Fi calling helps.
• Use low power mode when you know you will be out all day. It trims background activity and slightly reduces performance, which is a fair trade when you are far from a socket.
• Keep the software updated. Manufacturers often improve power management in updates, and it is a quick job over Wi-Fi.

When to Stop Worrying About It

It is worth saying plainly: you should not spend your life managing a battery. If you are ending a normal day with 30 per cent or more, whatever you are doing is working. If you are charging twice a day and the phone is more than a couple of years old, the battery may simply be worn out, and a replacement from a reputable repair shop is usually far cheaper than a new handset.

Look at the battery health readout in your settings if your phone has one. Anything above 80 per cent of original capacity is generally fine. Below that, and you will feel it. A sensible routine, a cool spot on the sideboard, and a charger that is not left plugged in overnight will see most phones through several comfortable years of use.