Sony Ericsson TM506 V800 W300 W302 Z530i Z610i Z750 Z320 Z530 Z610 P990i W300i W580i K530i K550i K550im W595 W610 W660 W705 W850 W880 W888 W900 W900 W950 W958 W960 BST-33 Battery High Capacity reliable OEM Battery rated at 900 mAh Expect to Approx. Double Your Talk and Standby Times OEM battery for you to keep as a reliable extra power source handy Advanced lithium-ion technology keeps phone working at optimum performance.