Battery Specifications2600mAh high-capacity rechargeable lithium-ion battery, 7.4V, 19.24W h. Battery dimensions ( 3.86 2.17 0.87 inches) feature a lightweight design (105g/ 3.7 oz). ^^ Perfect Compatibility Specifically engineered for Brady BMP21-Plus, BMP 21-LAB, BMP 21, IDPAL, and LABPAL label makers, ensuring precise fit and stable performance. ^^ Charging Indicator Includes a USB-C charging cable for fast and convenient charging. Built-in indicator clearly displays charging status: red - charging, green - charged, keeping you informed at all times. ^^ Effortless Installation & Charging Snap-in design allows tool-free replacement. High-quality Li-ion batteries extend operating time without memory effect and support charging at any time. ^^ Safe & Reliable Quality Each replacement battery is FCC and RoHS certified, meeting stringent quality standards. Built-in protection against overcharging, over-discharging, over-voltage, over-current, and overheating ensures safe and reliable device operation.