Techtronic Power Tools Technology Limited

Michael E Buckner

John Walter Schnell

Ronald C McCurry

James A Keith, Jr

Stuart R Miller

Frederick W Bryan

Edward A Pomeroy

James A Patton

Anthony Thomas Tocco

G Michael Hornick

Samuel Boyles

Umesh Rajani

Daniel Nelson

Umesh Jairamdas Rajani

Nicolas J Hanks

Daniel B Nelson

A power tool including a motor, a first battery pack, a second battery pack, a first switching element coupled between the first battery pack and the motor, a second switching element coupled between the second battery pack and the motor, and controller coupled to the first switching element and the second switching element. The controller includes a first pulse-width modulation (PWM) output coupled to the first switching element and a first PWM signal to selectively close the first switching element. The controller further includes a second PWM output coupled to the second switching element and a second PWM signal to selectively close the second switching element.

Multi-battery pack for power tools

Portion of a tool head

Portion of a power base

A battery tester engages a power tool battery and includes a housing having a cavity for receiving a stem of the power tool battery. The battery tester has a plurality of electrically conductive contacts disposed in the cavity and is configured to engage corresponding battery electrodes on the stem. A processor is mounted within the housing and communicates with the battery through the electrically conductive contacts. The processor measures a voltage level of the battery, and a loading circuit electrically loads the battery during measuring. One or more indicators are controlled by the processor. The processor activates the loading circuit for a predetermined period of time to measure a voltage level of the battery while under load, and then activates the indicators to provide a visual indication of remaining battery life. The battery tester is a stand-alone device where housing does not have a motor or a battery charger.

Battery tester for rechargeable power tool batteries

Growing community of inventors

Central, SC, United States of America

Michael E Buckner