3.7V USB Li-ion Mini Grinder Set

Product Overview

The 3.7V USB Li-ion Mini Grinder Set (model PT-5205U) is a compact, cordless rotary tool built for light-duty grinding, sanding, shaping and detailing tasks. With a built-in 3.7V Li-ion battery and USB charging, this mini grinder is perfect for hobbyists, model makers, DIYers and light repair work where portability and convenience matter.

Key Features

• 3.7V Li-ion battery with USB charging for fast, convenient power replenishment
• Cordless design for unrestricted use anywhere you need it
• Compact, lightweight body for precise control and reduced hand fatigue
• Compatible with common rotary bits for grinding, sanding, polishing and cutting accessories
• Simple controls for quick start and easy speed adjustments

Technical Specifications

• Model: PT-5205U
• Battery: 3.7V Lithium-ion
• Charging: USB input (standard USB cable)
• Use type: Light-duty grinding, sanding, shaping and detailing
• Design: Cordless, handheld mini grinder

Typical Applications

• Hobby and model making
• Jewelry repair and detailing
• Small woodworking and carving tasks
• Plastic and resin shaping
• Light metal deburring and polishing

Charging and Battery Care

• Charge the unit using a standard USB port or USB wall adapter until the indicator shows full charge
• Avoid overcharging and do not leave the battery on charge for extended periods after fully charged
• Store the mini grinder in a cool, dry place if not used for long periods

Safety and Maintenance

• Always wear appropriate eye protection and a dust mask when grinding or sanding
• Keep loose clothing and hair away from rotating bits
• Disconnect the tool from power before changing bits or performing maintenance
• Clean vents and housing regularly to prevent dust buildup and overheating

Accessories and Compatibility

The PT-5205U accepts common rotary tool bits and accessories for sanding, grinding, polishing and cutting. For best results use quality bits sized for mini rotary tools and replace worn accessories promptly.

Why Choose the 3.7V USB Li-ion Mini Grinder Set

• USB charging and cordless operation deliver maximum portability
• Designed specifically for light-duty precision work where a full-size tool is impractical
• Easy to handle for extended use during hobby and craft projects

Support and Warranty

Refer to the included user manual for safety instructions, charging guidelines and troubleshooting. Contact seller support for warranty details and service options.