As a years professional battery manufacture,mobile phone batteries are our daily products.Our wide range of products are universially applied to kinds of world brand mobile phones,like Nokia, SonyErisson,Moto,Samsung,etc. For Nokia battery BP-4L features Battery type: Li-ion Nominal voltage 3.7V Nominal capacity 1500mAh Working temperature -10 to 50 degrees Celsius Compatible Model:Nokia E52 E55 E61i E63 E71 E72 E73 E90 E95 6650 6650F N97 1)Original li-ion battery cell ensures high quality ,large capacity(750mAh),long cycles life(more than 500times). 2)Double IC and NTC PCB to offer over-discharging,over charging,over current and short-circuitprotection. 3)Safety and stability:undergos drop testing,smash testing and acupuncture testing to ensure no fire and explosion when breaking 3)No memory accumulation,full charging every time 4)Guarantee time:one year Welcome friends home and abroad to contact us,OEM service provided.