They have even lasted him through a couple days of school if he forgets to charge them overnight. The only reason I needed more was because the family grew. I ordered the toddler 4-5 for my 4 year old, thinking they meant age and not size. It charges my IPhone 12 pro max, my Series 6 Apple watch and my wireless charging earbuds. It was easy install. The fit is a half size small. I followed guidelines on waist size and it’s perfect. **Update January 2021Still just the same as when I purchased! The holes drilled were perfect and once the towel bar was mounted, it too was level. However, they fit to exact size and the straps were a little tight.