This Nokia BL-4CT is Original Nokia battery and it comes in the Original Nokia package. We have them in stock and we get them directly from Nokia warehouse. They are not aftermarket like most of the sellers sell, they are 100% Original Nokia product. This Nokia BL-4CT is compatible with Nokia 5310phones and more. OEM Part Number: BL-4CT Other OEM Part Numbers BL 4CT, BL4CT Battery Type: LiION Battery Capacity: 860 mAh Voltage: 3.7V Weight: 19 grams Size: 54mm x 34mm Battery Thickness: 4 mm Battery Color: Internal Battery SKU: BTNK-5310-MLIN21

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