Gilded connecter, better conductive properties, not easy to rust.Safety and stable:Hi-tech lithium-ion battery, undergoes drop test, smash test and acupuncture test to ensure no fire and explosion in breakingTop grade li-ion battery cell, high energy environmental protection battery,durable energy conservation,long standby time and long talking timeThis replacement battery has an integrated microantenna that prevents overcharging and lengthens battery lifeGuaranteed to be brand new and unuse