Cordless right-angle drills have a bit-holding chuck that is oriented 90° to the tool body, so they have a slim profile for accessing corners and reaching into tight spaces. These tools are commonly used for drilling in general maintenance and construction tasks. Cordless tools run on batteries, so they are more portable than corded tools and allow use where access to a wired power source is unavailable. They use brand-specific batteries, which fit different tools from the same manufacturer that have the same voltage and use the same battery series.