Apple MagSafe Battery Pack retails for S$139. It provides your iPhone between 40% and 70% additional charge. 40% if you are on the iPhone 12/13 Pro Max and 70% on the iPhone 12/13 mini.

Inside the battery pack is a 7.62V, 11.13Wh battery. Hence the capacity is about 1,460 mAh.

Apple MagSafe Battery Pack - Box Front
Apple MagSafe Battery Pack – Box Front