Although these chargers were great initially, I have to report that they broke down after 56 days of intermittent use. The chargers claim to be able to withstand "8000+ flexes" - which means I would have to flex the charger more than 145 times a day to wear it out. Far from it, and they've been used gently anyway. In less than two months of use, these chargers can't get a positive review from me. Return chargers and/or contact seller were not available in my order history screen. I do not recommend this.