Portable phone rechargeable lithium -ion battery

The utility model discloses a portable phone rechargeable lithium -ion battery, electric core in locating the lithium cell, and locate the electricity on the core and with electricity core electric connection's electric core protection shield, be equipped with the protection circuit on the electricity core protection shield, the protection circuit includes bridge rectifier BR1, thyristor V1, thyristor V2, thyristor V3, thyristor V4, triode Q1, triode Q2 and triode Q3, thereby make the lithium cell can both to guarantee the stability of voltage and electric current when using charging, voltage and electric current can not too big or undersizes, the damage avoiding moreover overcharging and cause the battery with the overdischarge, and the stable ability and the security performance of improvement lithium cell have prolonged the life of battery.