... 9. LED lifetime: 10, 000 hours· 10. Powered by 1 * 18650 battery 3.6/3.7V .· 11.Adjustable ... we are really sorry and will solve all problems by our side.On the other side every one of ... sure all of them in good condition only after ship out. Contact usWe care about all of our valued buyers ... , if you have any questions, please contact us by trademanager ,Email,Mobile phone,our Customer Service staffs will ...