Sony AA 2500 mAh Rechargeable Battery (Pre-Charged) (pack of 4) The Sony NiMH 2500mAh pre-charged rechargeable batteries are designed to last thrice longer than regular alkaline batteries for uninterrupted usage. The batteries are reliable and your perfect power companion.These Sony batteries are ideal to provide power to devices that are on the higher side of power consumption like cameras and recorders. This makes it convenient while you travel places and cannot charge the batteries often.