Haven’t had the product long to test longevity but early review is it functions well. Rarely leave reviews but felt it may be useful to note RE the USB C fitment, it is intended for the USB A Apple Watch charger but provided you use a small style USB A to USB C adaptor it works - this is what I have done, it’s very snug but just fits. Not it’s not the lightest of items if looking to use it for travel but even so it’s a well thought out design that can charge multiple items.