... offer over-discharging, over-current and short-circuit .more safeguard for using.Safety and stale: Hi-tech lithium-ion battery, undergoes ... warranty .bad percent is very low, for A quality ,the bad percent is 0%,for B qualtiy,the bad percent is 1%. defective ... mobile phone battery manufacturer, which produced all brand mobile battery for 12 years. such as nokia, samsung, blackberry, LG, HTC, motorola ...