These are your standard 1.5V AA alkaline batteries from Duracell. Don't even think about trying to recharge these. Roughly 1500mAh per AA cell. Combine 4 to get ~6V peak, and ~4.8V as they hit their discharge curve. Sold in single units. But if you order four at a time, it makes it easy for us to package them. Note: This item is non-returnable. If this item arrives damaged or is not functioning properly, please do not hesitate to contact us to see if further actions may be taken. https://elecena.pl/product/15532600/panasonic-alkaline-battery-aa 2019-02-23 https://elecena.pl/product/15532600/panasonic-alkaline-battery-aa 2022-02-21 https://elecena.pl/product/15532600/panasonic-alkaline-battery-aa 2025-04-12 https://elecena.pl/product/15532600/panasonic-alkaline-battery-aa 2025-04-14