Handheld Rechargeable Diamond Tool

This portable diamond-painting aid is 15 cm long and weighs only 85 g—light enough for children and comfortable for adults over prolonged use. Its energy source is a sealed 401030 polymer lithium-ion battery (500 mAh), charged via included micro-USB cable in 60 minutes and sustaining up to 3 hours of active suction work. Electrical parameters are precisely defined: 5 V input, 3.7 V output, 1 W power. The vacuum system works equally well with round and square resin drills, offering reliable pickup and controlled release. The form factor follows human-hand geometry, with tapered ends and central weight balance for natural thumb-index coordination.