Fix for Samsung Galaxy S2 ATT (SGH-I777) battery loop problem. - YouTube
How To Fix Samsung Galaxy S2 Wont Turn On [Troubleshooting Guide]
Samsung Galaxy S2 Fix For Boot Up, Battery, Power Problems [Part 1]
Samsung GALAXY Tab S2 9.7 SM-T818V Battery Replacement Kit with Tools, Video Instructions, Extended Life Battery and Full One Year Warranty - Walmart.com
Genuine Samsung Galaxy S2 i9100 Extended Battery Power Pack Case Reviews