When sourcing a 2-in-1 vacuum (stick and handheld), prioritize suction power (measured in Pascals/Pa or Air Watts/AW); a competitive model should offer at least 15,000Pa to 25,000Pa. Evaluate the battery capacity (mAh) and runtime, ensuring at least 30-45 minutes in standard mode. Additionally, check for HEPA filtration systems to ensure 99.9% particle capture, and verify the motor type, as brushless motors (BLDC) offer significantly longer lifespans and higher efficiency than brushed alternatives.