Precise Compatibility: Specifically designed for X2/I2/X2se/I2se self-balancing scooters. Features a 1:1 match with the original factory interface. No additional tools required for quick and easy replacement, ensuring perfect compatibility with existing devices. Smart Safety: Equipped with advanced BMS intelligent battery management system, continuously monitors battery status. Features four major protections: overcharge, over-discharge, overcurrent, and short circuit, eliminating safety hazards. Capacity Expansion: Supports flexible single/dual-pack usage. Dual-pack combination extends range, meeting both short-distance commuting and long-distance travel needs, eliminating range anxiety. Durable Performance: Utilizes high-energy-density lithium-ion cells with over 1000 charge cycles, 30% improved charging efficiency, and a rugged, impact-resistant shell with waterproof/dustproof design for diverse environments. Enhanced Safety: Integrated protection modules guard against overcharging, over-discharging, overheating, and short circuits. Combined with a flame-retardant shell, it ensures reliable and secure operation. The core highlight is its expandable capacity design: A single battery meets daily short-distance commuting needs, while dual-battery operation significantly extends range for weekend getaways, outdoor adventures, and other long-distance travel scenarios.