phone batteries are produced in low temperature , so cann't keep surface for a long time and not change ,but also can keep its characteristics. Their features as fellows: 1)Size: 4.7cm x 3.5cm x 0.4cm  2) High capacity 3) Voltage: 3.7V 4) Long cycle life 5) Excellent safety control 6) Long discharge time 7) Long speaking time.  8) 500pcs/carton, CTN: 41cm x 31cm x 24 cm,or pack according to your requiremenet. 9)Minimum order quantity:100 pcs 10)Delivery time :one month 11)Delivery place: within Guangzhou. China  12)Payment terms:T/T 13)Supply Ablity:30000pcs/week  We warmly welcome OEM orders according to your requirements.  We ensure prompt delivery, high quality and the best service. Wramly welcome to contact us!