Specification:Product name: Nitecore F1 Power BankInput : DC 5V、 ≥500mAOutput voltage: 4.2V±1% (slot)\/5V±5% (USB)、 1000mA MAX (slot)\/1000mA (USB)Compatible with: Li-ion \/IMR: 26650\/18650\/17670\/18490\/17500\/17335\/16340(RCR123)\/14500\/10440 (not included)Size: 3.43 inches × 0.94 inches × 1.15 inches (87.2mm×24mm×29.3mm)Weight: 1.07oz (30.4g、 without cord)Features:·Compatible with cylinder rechargeable Li-ion batteries of various sizes·Intelligent USB charging management system·Up to 1000mA fast charging through Micro-USB input port·1000mA fast charging through USB output port·Optimized design for IMR battery charging circuit·Three power indicators to indicate charging\/discharging status·Automatic power level detection·Instant battery voltage indication upon battery installation·Automatic battery detection and appropriate charging voltage\/mode selection·Battery reversed polarity protection and short circuit prevention·Made from durable PC material (fire retardant\/flame resistant)·Designed for optimal heat dissipation·Certified by RoHS、 CE、 FCC and CECPackage included:1 x Nitecore F1 Power Bank1 x Micro-USB charging cable1 x rubber bandEnglish Manual