... Good After-Sale 1:Feature: A): Standard MuTong battery series adopt class A huge-volume Lithium-ion ... prevent the core form explosion, make sure the Battery safe.D. Adopt SMT lead-free technology , ... times after full charge and discharge cycles, New battery ‘s internal chemicals will be all "active" ... time and shorten battery life.E. Refurbished and uesd mobile phone may consumpt power, standby time is ...