2 Battery - Battery Saver

Contains adsIn-app purchases
115K reviews
Content rating
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About this app

Does the phone run out of battery quickly? Does the phone always die at crucial moment? This app extends many extra hours to the battery life by managing Internet connection intelligently and in the background.

*** More Than 10,000,000 Downloads! ***

Android 2.x~8.x are also supported!

Our new app can auto switch 2 Battery. More functionality and flexibility. Download from Play on https://goo.gl/rts60P !

You don't need to manually turn on/off the Internet connection anymore. This app extends battery life by using a smart algorithm to turn on/off the Internet connection, reduce battery consumption and data usage, but still keep the important background data synchronized.

1. Auto manage 3G/4G/WiFi connection in the background
2. Show battery level and usage in the status bar
3. Efficient & easy to use

Or take time to configure the settings to get the most out of it and the longest battery usage time!

Try PRO version for 24 hours and get a refund if you don't like it.

★ Manage Internet connection intelligently in the background
★ Configurable enable intervals and settings
★ Detailed battery usage curve and information
★ Support whitelist and blacklist
★ Support night mode (PRO-only)
★ No ads (PRO-only)
★ Battery icon theme is changeable
★ Fully charged notification and low battery warning
★ Build-in screen filter to further reduce the screen brightness
★ Auto turn off the screen when you put the phone upside down on the table or into the pocket
★ Home screen widgets, battery level, quick settings
★ Display battery usage and time since last unplugged, estimated battery run out time, battery health status, voltage, temperature, etc. information

2 Battery Add-on
★ provide more battery icon themes

Permissions - some sensitive permissions are required:
• BIND_DEVICE_ADMIN: this app uses the Device Administrator permission which is used to provide the "Auto screen off" feature. It's optional
• READ_EXTERNAL_STORAGE/WRITE_EXTERNAL_STORAGE: used to read/save app log report from/to SD
• READ_PHONE_STATE, WRITE_SETTINGS: toggle Wi-Fi, mobile data, etc. settings for saving the battery
• PACKAGE_USAGE_STATS: get the top app information for the "Blacklist" feature
• SYSTEM_ALERT_WINDOW: used for the "Screen filter" feature

We have been selected as a Google I/O 2011 Developer Sandbox partner, for its innovative design and advanced technology.

Arabic-Feras Gazzawie
Croatian-Bruno Švorinić
Czech-Michal Fiurášek
Dutch-Niko Strijbol
French-Johan Jaworski
German-Michel Müller
Hungarian-Gulács Attila
Indonesian-Dwi Utomo
Italian-Michele Mondelli
Japanese-Yuanpo Chang
Polish-Grzegorz Jabłoński
Portuguese-Wagner Santos
Romanian-Stelian Balinca
Russian-Идрис a.k.a. Мансур, Ghost-Unit
Slovak-Patrik Žec
Spanish/Swedish-Tomas Sylverberg
Turkish-Kutay KuFTi
Vietnamese-Trần Thanh Bình

Become a beta tester? Please join 2 Battery (http://goo.gl/vcHKs7) Google group.

If you are interested in helping us to translate this app to your native language, please let me know.
Updated on
Sep 30, 2018

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location, App activity and 2 others
Data is encrypted in transit
Data can’t be deleted
115K reviews
Dave Martin
July 23, 2020
The only function it does is limit internet usage. That doesn't seem to work either. (Hello Sam, my battery was down to 8%. My day setting was set to 20%. As it read, the internet usage should have been suspended, but it wasn't. If I launched a local news app, it updated with the current news normally. I can't send you a log, I have deinstalled the app)
660 people found this review helpful
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Sam Lu
July 22, 2020
I need more information to check what the problem is. Please send me a log by going to: 2 Battery > Settings > App log > MENU > Email > select Gmail Please describe the problem in the email; otherwise, the log email will be ignored by the system. Please also attach some screenshots of the problem.
Robert Miller
January 18, 2022
good...but needs to hibernate phone....something is always running in background....The longer I use it, I can really see the difference as it really does save battery as my battery would go dead in 12 hrs or less just running, doing nothing but idleing and I am not a heavy user at all. I highly recomend this app for anyone who wishes to save a battery as it does work and work well, I only charge battery to 80 percent each time, to save wear on battery. Sam Lu has done a excellent job, congrats.
156 people found this review helpful
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Sam Lu
January 19, 2022
Thank you for your comments and rating.
Niny Mathe
November 14, 2021
This is perfect. The blue light filter is a bonus bcz my eyes are bad and i deleted the one i had already bcz this one has it included in the package. It sets an alarm when the battery has reached specified level. Great job. What more can I ask for really? I really don't know what people are complaining about
149 people found this review helpful
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What's new

★ fixed: app not responding error when turning on/off the screen in some cases
★ add FAQ #18 about how to remove the Android System notification icon on Android 8+. Settings > About > FAQ
★ bugs fixed and optimizations