... quality, reasonable in price, maching in color mobile phone battery for BST-33Battery type: Li-ionVoltage: 3.7vCapacity: 850mAhSize: ... , not easy to rustSafety and stable: Hi-tech lithium-ion battery, undergoes drop test, smash test and acupuncture test ... and explosion in breakingA grade li-ion battery cell, high energy environmental protection battery, durable energy conservation, long standby time ...