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High-Performance Laptop Battery: Crafted with premium lithium-ion cells, 15.4 V voltage, 77 Wh capacity (4950 mAh). Brand new OEM quality, extended lifespan, ensures reliable daily use Wide Compatibility: This L19M4PF1 replacement battery is fully compatible with multiple Lenovo models Easy DIY Installation: Includes complimentary screwdriver and pry tool for straightforward battery replacement. Professional support team provides step-by-step guidance if needed Durable and Safe Design: Utilizes Grade A battery cells with advanced multi-layer protection mechanisms to effectively prevent overcharging, over-discharging, short circuits, overcurrent, and overheating risks. Meets environmental standards and delivers stable and reliable performance Customer Support Available: Friendly customer service team is available to assist with any questions or concerns regarding your battery replacement