... 3.Built-in rechargeable lithium polymer Universal External Laptop battery pack specification: 1. Built-in rechargeable lithium polymer battery ( 5000MAH/11.1V(55.5WH ... and adapters which are compatibled with well-known brand notebooks including: IBM, Sony, Toshiba, HP, Acer, Compaq, DELL, Lenovo, Asus, and ...