Enhance your device’s performance with this high-quality 21V Replacement Lithium Battery, designed for durability, safety, and long-lasting power. Crafted with a fine quality plastic case featuring impact resistance and shockproof properties, this battery ensures reliable use even in demanding conditions. Equipped with an advanced integrated microchip, it delivers stable working performance while providing multiple layers of protection for both the battery and your device. Key Features: · Durable Plastic Case: Made from premium plastics material, the casing offers excellent impact resistance, shockproof design, wear resistance, and superior durability for extended service life. · Advanced Integrated Microchip: Ensures stable voltage output and reliable performance, while safeguarding the battery against common electrical risks. · Powerful Battery Core Configuration: Contains 5pcs of 1300mAh lithium battery cores that provide high capacity, low heat generation, quick heat dissipation, easy charging, and extended endurance for prolonged usage. · Comprehensive Protection System: Includes temperature protection, overtime protection, overcharge protection, overcurrent protection, and overpressure protection, coupled with protective panels to maintain battery safety and integrity. · Efficient and Reliable Power: Designed to help you complete your tasks faster and save time with enhanced working efficiency, this replacement battery is an essential upgrade for compatible devices. Specifications: · Battery Voltage: 21V · Battery Capacity: 1300mAh (5pcs lithium battery cores) · Package Dimensions: 130 x 110 x 50mm (5.12 x 4.33 x 1.97 inches) · Package Weight: 300g (10.58 ounces) Package Includes: · 1 x Replacement Lithium Battery This 21V Replacement Lithium Battery combines durability, safety, and long-lasting energy to keep your equipment running smoothly and efficiently. Its robust construction and smart protection features provide peace of mind, making it an ideal choice for anyone seeking a dependable power source upgrade.