The versatile grinder you described has several features that make it a convenient and efficient tool for various tasks. Here's a summary of its key features:

**Power Source:**
- Equipped with a rechargeable battery, providing extended use without the need for constant battery replacement.

**Cordless Design:**
- The cordless design enhances flexibility and ease of use, allowing for greater manoeuvrability during grinding and polishing tasks.

**Disc Bore Diameter:**
- Features a 16mm disc bore diameter, offering efficient and precise grinding, suitable for a variety of applications.

**Motor Quality:**
- High-quality motor ensures stable and smooth performance with a long service life, capable of operating at 15000rpm for reliable and efficient results.

**Humanized Design:**
- Spindle lock for easy disc replacement.
- Ergonomic handle for comfortable single-handed operation.
- Side toggle switches for easy grasping.
- Thickened baffle design helps reduce debris splashing during use.

**Materials and Battery Options:**
- Made of ABS and metal materials, ensuring durability.
- Available with either one or two 12V, 3C1300mAh batteries, providing options based on user preferences.

**Performance:**
- Boasts high speed, low noise, and good durability, making it suitable for various tasks such as surface treatment, iron cutting, and home decoration.

In summary, this electric grinding tool combines convenience, versatility, and durability, making it a valuable asset for tasks ranging from surface treatment to home decoration. The rechargeable battery, cordless design, and user-friendly features contribute to its efficiency and ease of use.