Owners of the Galaxy A25 5G describe a steady loss of three to four percent an hour with the phone idle, and the threads on Samsung's community site suggest several fixes. The drain often comes from the mobile network: a phone that switches between 4G and 5G in a weak area keeps the radio busy, so setting the network mode to LTE, or 5G only where coverage is strong, calms it. A restart helps for a day or two, which suggests a background process. Samsung's hidden service menu has a battery stats reset, reached with a code in the dialer, which some owners say helps after an update.
Clearing the system cache partition after an update, using adaptive battery, and putting rarely used apps to sleep are the usual remedies. If none helps, the battery itself may be worn. Before judging the battery, measure: charge to full, leave the phone idle on a table with Wi-Fi on for an hour, and read the percentage; a loss of one percent is normal and three or four is not. Do the same test in Safe mode, which turns off downloaded apps, so that you can tell an app cause from a system or battery one.
Differential
Likely causes of “Samsung Galaxy A25 5G battery drains too quickly”, and how to tell them apart
- 1
4G and 5G switching
What separates it The radio stays busy in a weak area
How to confirm Settings, Connections, Mobile networks, Network mode: LTE
- 2
A background app
What separates it The usage list shows apps with high background use
How to confirm Put the app to sleep in Battery settings
- 3
A post-update stall
What separates it Drain started after an update
How to confirm Restart and clear the cache partition
- 4
The 120 Hz screen
What separates it The screen is the biggest user
How to confirm Set Motion smoothness to Standard
- 5
A worn battery
What separates it The drain persists with a light load
How to confirm Contact Samsung for a battery check
Before you touch a setting
Record this first — changing settings destroys the evidence
- The percentage lost per hour at idle
- The mobile network mode and signal
- The apps at the top of the battery list
- When the drain began
Try in this order
0 of 9 completedRestart the phone
ReversibleClear background processes with a restart.
Open the battery usage list
ReversibleSettings, Battery and device care, Battery.
Put unused apps to sleep
ReversibleSettings, Battery, Background usage limits.
Change the network mode
ReversibleLTE in a weak 5G area.
Lower the refresh rate
ReversibleMotion smoothness, Standard.
Clear the cache partition
ReversibleBoot into recovery and wipe the cache partition after an update.
Measure the drain
ReversibleCharge to 100 percent, leave the phone untouched for an hour and note the loss, then repeat in Safe mode to see whether a downloaded app is responsible.
Check adaptive battery
ReversibleIn Settings, Battery and device care, Battery, More battery settings, make sure Adaptive battery is on so the phone learns which apps to restrict.
Remove apps you do not use
ReversibleUninstall apps that you have not opened in months, because each one can wake the phone for sync and notifications.
Model-specific
What is true of this model and not of its siblings
- Idle drain
- Three to four percent an hour is far above normal for the A25's 5,000 mAh battery.
- The radio
- Signal switching is a common hidden cause.
- The Samsung code
- Some owners use the dialer code for the service menu to reset battery statistics, but only do it from a reliable Samsung source, since the menu has options that change the phone.
- After an update
- Adaptive battery needs about a week to relearn your habits after a major update, so a drain that falls over several days is the learning period.
- A fair benchmark
- The A25's 5,000 mAh battery should give a day and a half of ordinary use, so lasting under a day with light use is worth investigating.
Stop boundary
When this stops being a self-service repair
- !If the drain exceeds three percent an hour on a clean restart, contact Samsung
- !If the battery swells, stop using it
- !If a battery check fails, ask for a replacement
Evidence ledger
Sources behind this answer
Owner thread about a steady drain of three to four percent an hour.
Owner thread linking battery drain with the 4G/5G switching.
Specifications: 5,000 mAh battery, 25 W charging, Exynos 1280, 6.5-inch 120 Hz Super AMOLED.
Exact questions
Common questions
How fast should an idle A25 lose battery?+
Under about one percent an hour.
Does 5G drain the battery?+
In a weak area, yes.
Will a restart help?+
Often for a day or two.
Why does my A25 drain overnight?+
A background app or the 4G and 5G switching; use Safe mode to test.
How long should the A25 battery last?+
About a day and a half of ordinary use.