8 Ways to Fast-Charge Your Smartphone's Battery Put your device on "low power mode" or "airplane mode." Shut down any apps on your smartphone when you are done with them. Quit allowing your device to automatically update apps. Do not use your phone while it's charging. Do not leave your device out in a hot climate. Avoid USB ports for charging and instead pick a wall outlet or portable battery pack. Purchase a "fast" phone charger, which you can find on Amazon. Allow your phone's battery to completely drain once a month.
