Smartphone batteries often drain quickly because of apps running in the background, constant wireless connections and poor charging habits.
Experts say simple adjustments, such as closing unused apps, limiting background activity and turning off features like Wi-Fi or Bluetooth when they are not needed, can significantly extend battery life and help prevent unexpected power loss during the day.
Technical engineer David Chikadel said many users underestimate how many processes continue running on their phones even after they stop actively using them.
“Losing 50 per cent battery overnight may be unusual, but it depends on what is running on the phone,” he said.
“Make sure you close any apps you are not using and ensure the display is turned off while you sleep.”
Chikadel explained that reducing background activity during periods when a phone is idle, such as overnight, is one of the easiest ways to conserve battery power. Leaving apps refreshing in the background or allowing the display to remain active can steadily drain the battery without the user realising.
Wireless connections can drain power
Wireless connections can also contribute to rapid battery loss. Smartphones constantly search for signals when features such as Bluetooth, Wi-Fi and mobile data are enabled, which increases energy consumption.
“Another possible source of drain is the phone’s radios,” Chikadel said.
“Disable Bluetooth, location services, mobile data and Wi-Fi and see if that makes a difference.”
While these features are useful, leaving them all enabled, especially when they are not needed, can significantly reduce battery life.
Battery age also matters
Battery performance can also decline as smartphones age. Over time, batteries lose their ability to hold a full charge.
“If your phone is more than a couple of years old, the battery may simply be showing its age,” Chikadel said.
“If you plan to keep the device, replacing the battery may be worth considering.”
Monitoring apps can help identify the problem
Tracking battery usage is another effective way to identify apps that consume too much power.
A contributor on the discussion platform Quora recommended installing a battery monitoring tool such as AccuBattery to better understand how different apps use power.
Battery monitoring apps analyse charging and usage patterns, helping users determine whether a specific app is consuming more energy than expected.
The writer also suggested periodically restarting the phone to resolve apps that may be malfunctioning.
“Reboot the phone to fix any errant apps and set as many apps as possible to go to sleep when they are not being used,” the contributor said.
Many smartphones allow rarely used apps to be placed into a “sleep” or restricted mode, preventing them from running background processes unless they are actively opened.
Removing unused apps can improve battery life
Deleting unnecessary apps is another effective strategy. Many people install applications they rarely use, yet those apps may continue running background services.
“Uninstall or disable apps you do not need,” the Quora contributor advised.
“Try removing some apps and see if they are responsible for the sudden drop in battery life.”
Some advanced users also choose to limit the number of background processes their phones can run simultaneously through developer settings.
Charging habits can affect battery health
Technology contributor Athena Sek said charging habits can also affect long-term battery performance.
“Ideally, you should unplug the phone once it is fully charged,” she said.
She also warned that excess heat can damage smartphone batteries.
“Do not keep your phone in a trouser pocket for long periods — body heat can affect battery health.”
Most smartphones use lithium-ion batteries, which can degrade faster when exposed to high temperatures.
Check battery health and calibration
Electrical engineer Richard Lim said users experiencing sudden battery loss should check whether the issue is related to actual power consumption or inaccurate battery readings.
“Look into battery calibration, health and consumption,” he said.
Battery calibration helps ensure that the device correctly measures the amount of charge remaining. Without it, the battery percentage displayed on the screen may drop faster than the actual charge being used.
Lim recommended monitoring battery behaviour over several days before assuming the battery itself is faulty.
“Install AccuBattery, run it for at least a week and then review the results,” he said.
Check which apps use the most power
Technology enthusiast Chuck Rogers said many apps continue running in the background even after they appear to be closed.
“Too many apps may be using power in the background,” he said.
Users can identify these apps by checking their phone’s battery settings.
“Go to Settings → Battery and scroll down. The biggest battery users will usually appear at the top,” Rogers explained.
Most smartphones also allow users to control which apps are allowed to refresh in the background.
“Go to Settings → General → Background App Refresh and turn off the apps you do not need running constantly,” he said.
Heavy phone use drains batteries faster
Activities that require significant processing power — such as gaming or streaming video — can also drain batteries quickly because they use both the processor and internet connection heavily.
“If you watch a lot of videos or play games frequently, consider plugging the phone in while doing those activities,” Rogers added.
Even with careful battery management, smartphone batteries will gradually degrade over time.
“Batteries begin losing capacity from the moment they are first used,” Rogers said.
