At a glance
- Latest version
- v3.9.8.1.3 (5031)
- Updated
- Aug 23, 2025 (1 year ago)
- APK size
- 6.3 MB
- Requires
- Android 2.3+ (API 9)
- CPU support
- Any (no native code)
- Category
- Tools (app)
- Listed since
- Jun 26, 2013 (at least)
- Permissions
- 25 (5 sensitive)
- Website
- duapps.com
- Developer contact
- [email protected]
- Privacy
- Developer's privacy policy
About this APK
DU Battery Saver is an app by duapps in the Tools category, listed since at least June 2013. It has no native code, so it runs on any Android processor.
It asks for 25 permissions, 5 of them sensitive, including read phone status and identity, find accounts on the device and display over other apps. Compared with version 4.7.5, it drops 1 permission: “Read shared storage”.
Ratings
Ratings from users of the source store — not collected or verified by AAPKs.
What's new in v3.9.8.1.3
Description
From the listing uploaded by “neymarjn”.
Version history
3 versions are listed, going back to v4.7.4. Since v3.9.8.1.3 it requires Android 2.3+.
Security & authenticity
Signing certificate
- Certificate issued to “Tapas Mobile” Not the developer's name (“duapps”). Names in certificates can't be verified, so this alone proves nothing.
- Same certificate as the 2 other versions checked
Store checks and file details
- Developer signature verified Apr 3, 2016
- Antivirus scan passed Jan 16, 2020
- Signed byCN=Tapas, OU=Tapas Mobile, O=Tapas Mobile, L=Beijing, ST=Beijing, C=CN
- Signing certificate (SHA-1)EC:D5:A7:AD:A0:AD:65:6E:CE:B9:B8:DE:79:9E:61:C2:0E:71:4D:7F
- File MD5beb35b475a552cf6d6a0ba20c8d3c81c
- Uploaded by “neymarjn” 323 followers · uploading since 2016
Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.
Permissions (25)
DU Battery Saver requests 25 permissions, 5 of them sensitive.
- Display over other apps Sensitive android.permission.SYSTEM_ALERT_WINDOW
- Find accounts on the device Sensitive android.permission.GET_ACCOUNTS
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- Read phone status and identity Sensitive android.permission.READ_PHONE_STATE
- Write settings Sensitive android.permission.WRITE_SETTINGS
- Add home-screen shortcuts com.android.launcher.permission.INSTALL_SHORTCUT
- Battery stats android.permission.BATTERY_STATS
- Bluetooth android.permission.BLUETOOTH
- Bluetooth admin android.permission.BLUETOOTH_ADMIN
- Change network state android.permission.CHANGE_NETWORK_STATE
- Change wifi state android.permission.CHANGE_WIFI_STATE
- Control vibration android.permission.VIBRATE
- Dxbs closeapp (custom) com.dianxinos.dxbs.permission.CLOSEAPP
- Dxbs update (custom) com.dianxinos.dxbs.permission.UPDATE
- Full network access android.permission.INTERNET
- Get package size android.permission.GET_PACKAGE_SIZE
- Get tasks android.permission.GET_TASKS
- Kill background processes android.permission.KILL_BACKGROUND_PROCESSES
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Read sync settings android.permission.READ_SYNC_SETTINGS
- Restart packages android.permission.RESTART_PACKAGES
- Run at startup android.permission.RECEIVE_BOOT_COMPLETED
- View Wi-Fi connections android.permission.ACCESS_WIFI_STATE
- View network connections android.permission.ACCESS_NETWORK_STATE
- Write sync settings android.permission.WRITE_SYNC_SETTINGS
Required hardware & features
- Bluetooth android.hardware.bluetooth
- Portrait screen android.hardware.screen.portrait
- Touchscreen android.hardware.touchscreen
- Wi-Fi android.hardware.wifi
DU Battery Saver APK: questions and answers
Can I install this APK over the version I already have?
Only if it is signed with the same certificate as the copy on your phone and isn't an older version. If Android says “App not installed”, the certificates differ; uninstalling your copy first works but deletes its data unless it is backed up.
Is the DU Battery Saver APK safe?
No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is beb35b475a552cf6d6a0ba20c8d3c81c.