... reasonable in price, maching in color mobile phone battery for BST-33Battery type: Li-ionVoltage: 3.7vCapacity: 850mAhSize: ... for using.Gilded and flexible connecter, better conductive properties, not easy to rustSafety and stable: Hi-tech lithium-ion battery, ... undergoes drop test, smash test and acupuncture test to ensure no fire and explosion in breakingA grade li-ion battery ...