The Galaxy A26 5G runs One UI 7, which gives you several ways to peek at battery health. Most of them are straightforward, but a couple are hidden behind dialer codes. Let's get into what actually works on this phone.
Check the Built-in Battery Status
Open Settings > Battery and device care > Battery. You'll see a simple label that says "Normal" or "Weak".
Samsung doesn't give you a precise percentage here, unlike some other brands. Normal means the system thinks your battery capacity is still within acceptable parameters.
If you see a message suggesting a service center visit, the software has detected significant degradation. That's your cue to start looking at replacements.
Run the Samsung Members Diagnostic
Open the pre-installed Samsung Members app and tap the Support tab. Select Phone diagnostics and then tap Battery.
The phone runs a quick discharge check to see if the battery is behaving abnormally. It's a solid second opinion if you're unsure about the basic status in settings.
Pass both checks and your battery hardware is almost certainly fine. Fail the Members diagnostic and you've got a clear, software-verified reason to seek a repair.
Dial Into the Hidden Battery Menu
Open the Phone app and dial *#0228#. This brings up Samsung's service menu with real-time battery data.
You'll see voltage, current, and temperature. A healthy battery at full charge should show a voltage around 4.3V to 4.4V.
If the voltage drops quickly or doesn't reach that range on a full charge, the battery chemistry is wearing out. I find this menu much more useful than the basic "Normal" label for measuring actual battery health.
Turn on Battery Protection
Go to Settings > Battery > Battery protection. One UI 7 offers three modes: Basic, Adaptive, and Maximum.
Maximum caps the charge at 80%, which dramatically reduces lithium-ion battery stress. If you tend to plug your phone in at night or while sitting at a desk, this is the single most effective setting to slow down long-term degradation.
Adaptive mode learns your schedule and stops charging at 80% until right before you usually wake up. Both options are much healthier than letting the battery sit at 100% for hours.
Check Which Apps Are Draining Power
Head to Settings > Battery > Battery usage to see a breakdown of what consumed your charge since the last full cycle.
Tap any app to see how much time it spent running in the background versus on screen. An app draining battery in the background that you rarely open is just wasting power.
Tap the app and select Put to sleep or Deep sleeping. This prevents it from running in the background and can noticeably improve your daily battery life without you changing how you use the phone.
Recalibrate the Battery Gauge
If your phone is showing weird battery stats, like jumping from 30% to 5% or displaying the wrong time remaining, the gauge might need resyncing. This is a known quirk on the A26 lineup.
First, let the battery drain completely until the phone turns off. Plug it into a 25W USB PD 3.0 charger with PPS support and let it charge uninterrupted to 100%.
If the problem sticks around, try clearing the cache partition. Turn off the phone, press and hold Volume Up + Power, then use the volume keys to select Wipe cache partition. This clears temporary system files without deleting your personal data. For a forced restart during normal operation, press and hold Volume Down + Power for 10 to 15 seconds until the device restarts.
