3.70V,1800mAh,Li-ion, Replacement MP3 Player Battery for PIONEER GEX-INNO1, XM2go, inno, inno2BK, Compatible Part Numbers: 990216 Battery Type: Lithium-ion (Li-ion) | Voltage: 3.70V Capacity: 1800mAh | Color: Black Dimension: 51.65 x 38.00 x 10.90 mm Rate: 6.70 Wh | Weight: 45.40 g Please ensure the product(s) that you are going to buy fits the brand, model and part number of your device.