Also known as Sony Ericsson WT13i, the Sony Ericsson Mix Walkman is a candybar feature phone with 3″ capacitive scratch-resistant touchscreen. It has 3MP camera, FM radio, Wi-Fi, Bluetooth, and supports up to 32GB microSD memory cards.

The Sony Ericsson Mix Walkman uses same battery as Sony Ericsson Yari. Here is battery specs.:

Part Number: ML-E030
Type: Li-Polymer
Voltage: 3.7V
Capacity: 700mAh
Replace Code: BST-43
Compatible with Sony Ericsson Mix Walkman, WT13i, U100i, Yari