New OEM Samsung Battery for is fantastic as a short road trip battery. It's bigger than I want to carry when flying but is perfect for charging. Right now Samsung has their New OEM Samsung Battery for Galaxy S2 T989 T-Mobile, i727 Skyrocket AT&T,Nexus SPH-L700 AT&T Galaxy Rugby LTE i547 EB-L1D7IBA 1850mAh (Not for Sprint D710 S2 or i777 S2 ATT) for cheap price. You'll just need to visit the site.
Samsung uses the latest Lithium Ion battery technology giving you the best performance possible. This Lithium Ion battery is designed specifically for your Samsung Galaxy S II Hercules T989/Skyrocket I727 mobile phone to deliver the most reliable and long lasting power (2100 mAh). The Galaxy S II Hercules T989/Skyrocket I727 1850 mAh battery is also NFC-enabled, letting your phone communicate with other devices and accessories equipped with NFC technology. OEM Part Numbers: EB-L1D7IBA / EB-L1D7IBAB / EB-L1D7IBABSTD / EBL1D7IBA. Compatible with the Samsung Galaxy S II LTE i727R, Samsung Galaxy S II Skyrocket i727, Samsung Galaxy Nexus Sprint SPH-L700, Samsung Galaxy S II (T-Mobile) T989, Samsung Galaxy Rugby LTE i547C and Samsung Rugby Pro i547 phone models.