Fitment notice exclusive rs300 compatibility this replacement lithium-ion battery pack is engineered exclusively for the cunfon rs300 electric scooter. Designed to seamlessly match the internal deck space, locking mechanism, and wiring connections of your rs300. Restore your original riding range & performance if your rs300 is experiencing reduced mileage, unexpected power drops, or slower acceleration, this direct-replacement battery pack restores full factory range, responsive acceleration, and dependable hill-climbing power. Key features plug-and-play installation: comes complete with matching power and communication wiring harnesses for a straightforward, direct replacement experience. Smart bms protection system: features an advanced smart battery management system that continuously monitors internal cellular balance, providing built-in protection against overcharging, over-discharging, short circuits, and thermal overheating. Perfect deck enclosure fit: form-fitted specifically for the rs300 under-deck battery compartment, protecting internal components from trail vibration and daily riding impacts. High-quality lithium cells: built with high-energy density rechargeable cells designed for long cycle life, steady power output, and low self-discharge rates. Specifications compatible model cunfon rs300 electric scooter only battery type rechargeable lithium-ion battery pack connectors original matching power & communication harnesses mounting location under-deck chassi...