The Klein Tools KTB1 is a Lithium-ion powered portable battery (power bank) designed to charge common mobile devices like cell phones, tablets, portable batteries, headphones, headlamps and other smaller USB devices. KTB1 is equipped with Qualcomm® Quick Charge™ technology, delivering up to 75-Percent faster charging versus conventional USB charging. KTB1 features a rugged, compact design with impact resistant housing to stand up to active, professional daily use.