This product has a high capacity of 10400 mAh. They are waterproof and temperature resistant. There are indicators on this power bank to show the battery level. This product has four 2600mAh Li-ion battery cells incorporated inside. The edges of this power bank are smooth and you can easily carry them in your backpacks. There is a power indicator to turn it on or off. They provide fast charging and are equipped with various charging ports. This power bank has a separate USB cable inside the packing for easy charging. This power bank is currently popular with every smartphone user.