Compatible Models:

Samsung Galaxy S2 Epic 4G Touch SPH-D710 ( Sprint )
Samsung Galaxy S2 Epic 4G Touch SPH-D710 ( Boost Mobile )
Samsung Galaxy S2 Epic 4G Touch SCH-R760 ( US Cellular )
PLEASE NOTE: This battery is not compatible with NFC or Google Wallet.
Not compatible with Galaxy Nexus I9250, Galaxy S2 I9100, 
S2 T989, S2 Skyrocket i727, S2 Nexus SPH-L700