how long does a 4000 mah power bank last

Introducing our new 4000mAh power bank; the perfect solution for keeping your devices charged on the go! With its high capacity, this power bank can provide multiple charges to most smartphones and other small devices. The 4000mAh capacity can easily provide up to 2 full charges for most smartphones, making it an essential accessory for traveling, camping, or just for everyday use. Its compact and lightweight design allows for easy portability, so you can carry it with you wherever you go. The power bank also features fast-charging technology, ensuring your devices are powered up in no time. With built-in safety features to protect against overcharging and short circuits, you can trust that your devices will be safe while using our power bank. Say goodbye to the stress of running out of battery and say hello to convenient, reliable charging with our 4000mAh power bank!