For the price you should not expect all too much you. Nevertheless, I am pleasantly surprised. Just the other day I let him load the night until the morning at about 8 clock. With my phone I had to navigate through a plug of about 60km and I was in an area where power rarely is. The power-seeking claims a battery being too and although he has kept to 18 clock in the evening. The only thing that bothered me a bit was that the words "Made in Japan / FINISHED IN KOREA" was painted with a black pen, but that could scrape with the nail.
Conclusion: All in all a good performance for the price.!