Replacement phone batteryi550: 1)Capacity:900 mAH or depends on customer's reqirement; 2)Voltage:3.7v 3)Talk time:210minuts 4)Standby time:160hours 5) Life cycle: at least 500 times 6)Battery type:lithium Ion 7)Guarantee time:1year 8)Weight:12grams 9) Size:same as the original one 10) Compatible with Samsung:i550 11) Grade A Li-ion battery cell: aluminum shell core and double protection IC 12) Environment protection certification High quality, competitive price, fast delivery, best service. Warmly welcome to contact us.