Key Features
High-capacity 291.8mAh lithium battery designed for Apple Watch Series 4 (44mm), ensuring extended usage and reliable power backup. Precision-engineered with premium-grade lithium-ion cells for enhanced durability, stable voltage output, and over 500 charge cycles without significant degradation. Seamless compatibility with Apple Watch S4 (44mm), featuring a plug-and-play design for effortless DIY replacement—no specialized tools required. Built-in advanced protection circuitry to prevent overcharging, overheating, and short circuits, ensuring safe operation for daily wear and fitness tracking. Ideal for watch repair shops, tech enthusiasts, and bulk buyers seeking cost-effective, high-quality battery replacements at wholesale pricing. Globally certified for performance and safety, sourced directly from trusted manufacturers—no middlemen, no inflated costs.