Tzumi EcoJuice Rechargeable AAA Micro-USB Universal Battery is ready to use right out of the package for all devices. to last longer for high drain electronics such as: camera DSLR flash units, game controllers ( xbox ), remote controls, wireless keyboards & mice, and other devices. Directions: Instructions: 2 Easy Ways to Charge (Results may vary depending on conditions): Built-In Smart LED: Red indicates charging; blue indicates fully charged. 1 - Insert dual micro-USB cable (included) into any USB charging device. 2 - Works with all universal chargers (Results may vary depending on conditions). Read less Specifications Features No features description available Model 4798WM Brand EcoJuice Contained Battery Type Lithium Ion Manufacturer Part Number 4798WM Size AAA Assembled Product Weight 0. 7 lb Assembled Product Dimensions (L x W x H) 5. 00 x 1. 00 x 3. 50 Inches.