PowerSmart 3.7V 1500mAh 5.6Wh Battery for Sony Ericsson Vivaz 2, Sony Ericsson ST21a, Sony Ericsson ST21a2, Sony Ericsson ST21i, Sony Ericsson ST21i2, Sony Ericsson ST23a, Sony Ericsson ST23i, Battery Type: Li-ion Voltage: 3.70V Capacity: 1500mAh Color: Black Dimension: 48.50 x 48.10 x 5.65 mm Product Type: Replacement Battery (Brand New) Condition: New, 1 year warranty! Rate: 5.60 Wh Weight: 35.15 g Please ensure the product(s) that you are going to buy fits the brand, model, part number and dimension (mentioned above) of your device.