I started using this power bank because of its cool and attractive design it really a style statement if you carry this power bank with you and its battery life is pretty good for my smartphone and I almost carry this with me everywhere because it easy to carry and not that big in size , just charge it for some time and you will get lot of battery available . According to its price its very good and affordable , you can charge two phones at a time and it will provide you good battery life , I really trust this power bank for long run really helpful.