Specification: BST-30 Rechargable Battery For Sony Ericsson Suitable Models: K300a / K300c / T290a / T290c / T290i / J200i / Z500a / K506c / K508i / K508c / K500i / K500c / F500i / K700c / K700i / Z208 / Z200 / K300i Features: 1) Aluminum case 2) Grade A battery and IC protector 3) High capability 4) Low inter resistance and long standby time 5) Voltage: 3.6V Best Quality,Lowest price and prompt delivery!