Fix iPhone/Android Randomly Dying at 30% (Calibrate Your Battery) - YouTube
Amazon.com: Duracell Powermat 24-Hour Power System for iPhone 4/4s - White : Cell Phones & Accessories
Homemade iPhone 4s battery from a 18650 : r/techsupportmacgyver
iPhone 4S Battery Life Bugs Got You Down? Try This | TechCrunch
iPhone 4S Troubleshooting - iFixit
Swelling iPhone 4S Battery About To EXPLODE! | I found an iPhone 4s with a swollen battery in my closet, its gotten so big that it cracked the front screen and popped
Why your iPhone battery meter sometimes goes haywire | Mashable
After yesterday's shelling, there was no electricity for more than a day. Modern phones are dead and I read the news on this iphone 4s. Kharkiv, Ukraine : r/iphone