Precise adaptation: Perfectly compatible with all series of X2, I2, X2se, I2se balance scooters, zero error installation. Intelligent lithium battery: Adopting intelligent lithium-ion battery pack with high energy density and strong charging and discharging efficiency, which guarantees the stable power output of the balance bike. Expandable capacity: Innovative expandable capacity design, can be flexibly combined according to the travel demand, easy to deal with long-distance riding. Upgraded safety protection: Built-in multiple protection modules for over-charging, over-discharging, overheating and short-circuiting, together with the flame-retardant shell, it is safe and reliable to use. Long-lasting and durable: After strict cycle charging and discharging tests, it has a long service life, which effectively reduces the cost of battery replacement and provides long-lasting battery life. The high-performance rechargeable battery tailored for X2, I2, X2se and I2se balance bikes is equipped with advanced intelligent lithium-ion technology, realizing efficient and stable power supply. The breakthrough expandable capacity design meets the user's personalized needs for endurance, which lasts for a long time, whether for daily commuting or outdoor exploration. Multiple protection mechanisms effectively prevent overcharging, over-discharging, short-circuiting and other problems, ensuring safe and worry-free use. Accurately adapted to various models of balance scooters, plug-and-play, easy to install, is the ideal replacement and upgrade option for the original battery.