This mini portable power bank with ABS cover is for one-time emergency use only, no-rechargeable. No extra cable or wire needed, not chunky anymore, compact and portable, it can be put in the purse. Competible with 95% devices in the market with USB charging, such as smartphones, Ipod, MP3, MP4, bluetooth, digital camera. Other power capacity and lower quantity are available. 2 1/4" L x 2" W x 2/5" H