Overview: Ultra-mini design Adjustment charging leads allows this charger to charge virtually all lithium batteries Automatic polarity detection provides maximum safety & means that you can insert battery whichever way that's convenient for you Built-in USB (Universal Serial Bus) 2.0 Micro SD/ Transflash TF card reader USB 2.0 data & power interface Easily recharge batteries of your cell phone, PDA, camera, & other gadgets anywhere with USB (Universal Serial Bus) port access (internet cafe, library, office, school, etc) Specification:1.77in*0.98in*0.98in 0.4oz