High power battery-powered system

A power tool comprising:

• a housing;
• a brushless direct current (BLDC) motor supported by the housing, the BLDC motor including an output shaft operable to drive a tool element, the BLDC motor having a nominal outer diameter of up to about 80 mm;
• a battery pack including a plurality of battery cells electrically connected and having a nominal voltage of up to about 80 V;
• and
• a controller operable to control the transfer of current between the battery pack and the BLDC motor, wherein the BLDC motor provides an output of at least about 2760 Watts when powered by the battery pack.

A power tool comprising:

• a housing;
• a brushless direct current (BLDC) motor supported by the housing, the BLDC motor including an output shaft operable to drive a tool element, the BLDC motor having a nominal outer diameter of up to about 80 mm;
• a battery pack including a plurality of battery cells electrically connected and having a nominal voltage of up to about 80 V, the battery pack having a weight between 5.5 lbs and 11.25 lbs;
• and
• a controller operable to control the transfer of current between the battery pack and the BLDC motor, wherein the BLDC motor provides an output of at least about 2760 Watts when powered by the battery pack.