The most indispensable accessory for your cell phone is the battery. Without power, even the advanced phone is useless- unless you are need of a paper weight! Use this original OEM Sony Ericsson BST24 rechargeable battery as a replacement or spare to extend your talk time and keep your handset working at optimum performance levels at all times. Just pop it in your pocket or bag and you’re good to go that extra mile, chatting with your friends, at work, or on the road.