TEN 10-FINGER DRILL BATTERY 21V

at a high-capacity lithium-ion battery pack typically used for cordless power tools (like drills, saws, or leaf blowers).
​Here is a breakdown of the technical specifications and features shown:
​Technical Specifications
​Voltage: 21V (This is the "max" voltage rating; it is cross-compatible with most 18V-20V tool systems).
​Capacity: 12000mAh (12.0Ah). This is quite high for a power tool battery, suggesting a long runtime but also a heavier weight.
​Current: 8A.
​Power: 200W.
​Key Features
​Unlock Button: The red button on the front is a spring-loaded latch. You press this down to slide the battery off the tool or the charger.
​Charging Port: Uniquely, this battery features a DC barrel jack port (visible in the bottom view). This means it can be charged directly with a wall adapter, in addition to the standard slide-on dock style chargers.
​Mounting Rails: It uses a standard slide-on interface. While it looks similar to many "Makita-style" generic interfaces, always double-check your tool's pin configuration before connecting