The primary distinction lies in the motors: most M18 tools use brushed motors, while brushless motors power ALL M18 FUEL tools. Brushless technology offers improved efficiency, longer tool and battery life , reduced motor wear, and enhanced durability, making M18 FUEL tools ideal for daily professional use. The MILWAUKEE® searchlight has a pivoting head that provides 1,250 lumens of TRUEVIEW™ High Definition Output and over 730 yards of beam distance to spot objects and areas at a far distance. Brushless drills offer superior performance, longer runtime, and increased durability, making them an excellent choice for professionals or those tackling heavy-duty projects. On the other hand, brushed drills are reliable and more budget-friendly options for lighter projects. The high power LED searchlight can run up to 4 hours on flood mode and spot/flood mode, 7 hours on spot mode and 5 hours on strobe mode with an M18™ REDLITHIUM™ XC 5.0 Battery Pack attached. More wraps or turns around each pole gives the motor more torque and a lower kv (rpm per volt). More turns will allow the motor to turn a bigger propeller, and fewer turns will limit the torque so it can turn a small prop at high speed. As a general practice, it is best to unplug battery chargers and remove batteries when not in use. No battery pack damage will occur, however, if the charger and battery pack are left plugged in. 12V and 18 V Li-Ion batteries in the 12 and 18 V Li-Ion Combo Charger. Milwaukee® batteries feature different voltages. Voltage impacts weight, charge time, runtime and compatibility with various tools. For example, a Milwaukee® M18™ provides 18 volts and lasts longer than a Milwaukee® M12™ battery, which offers 12 volts.