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1. after using for a few weeks, it seemed to kinda learn about my usage of phone (I.e. turning the brightness level to save battery when to change or not), which is a cool feature.

2. Running this app and having it show full-screen 30-screen video commercials used battery power! If you really need your device to charge as fast as possible when plugged in then Power-Off the device.

3. This app is extremely effective in making your phone more energy efficient and hopefully the cool down feature will enhance battery life as well.

4. That would make it more convenient and faster.I actually really am surprised at how much of a difference this app makes in prolonging the life of your phone particularly, i cant really tell if or what cooling down the cpu necessarily does immediately after cooling and if its a significant noticeable change or not but.

5. Also, when using the app and maximizing battery life, instead of having a to-do list, I wish there was one button to do all the processes.

6. The functions it does offer in the settings didn't even work.I am actually impressed with this app! I have tried a few other "fast battery chargers" only to be bombarded with ads & was not happy with how it would constantly take me to the battery screen.

7. I especially like having battery stats in the notification bar, but the remaining battery time does not update unless you open the app back up.

8. There will be ads, unless you subscribe.Was using a product called Superfast Battery Charger for a couple of months.

9. I plugged my phone in last night and, when I awoke, it was only 89% charged with twenty-nine minutes remaining until fully charged! I switched to this and it will be fully charged in eight minutes.

10. Also, it isn't clear to me that having this app running while charging would actually improve battery charging.

11. Lastly, the battery charge to time ratio is not always accurate.

1. Fix Fast charger Not Working/Crashes/Errors/Unresponsive & Black/White screen:

1. Restart Fast charger: Restarting the app will resolve most errors.
2. Update the Fast charger App. Here is how:
   1. On Android goto PlayStore » Search for "Fast charger" » Open Fast charger – Fast charging, Battery Optimizer » click "Update".
   2. On iPhone, goto AppStore » Your profile » Available Updates » Check for Fast charger » click "UPDATE".
3. Clear Fast charger – Fast charging, Battery Optimizer app cache: Clearing cached data will force your app to retrieve the latest data directly from Fast charger servers.
   1. On Android, goto Settings » Apps » Select "Fast charger – Fast charging, Battery Optimizer" » click Storage » click "Clear Cache".
4. Check Fast charger app permissions. If any of these permissions required to use your device's features are disenabled, Fast charger might not work.
5. Uninstall and reinstall Fast charger. If nothing else has worked, completely uninstall Fast charger then reinstall.
6. Restart your device. Last, restarting your device can often clear most problems causing Fast charger not working

2. Fix Fast charger Server issues & Internet Connection

1. Check network connection: An unstable Internet will make Fast charger be unable to connect to it's servers. Ensure your wi-fi is working then restart app.
2. Disable VPN: VPN can cause connection errors and lead to Fast charger not working. Make sure all VPNs are off
3. Enable background data: When Background data is turned off, Fast charger may not be able to connect to the Internet when running in the background.